Difference between revisions of "Spell Damage Increase"

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{{Item property infobox
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| desc = This property increases the damage for most magical attacks that are casted. While the property is normally capped at 15% in PvP, the cap can be further increased to 30% for focused templates. Focus templates have no more than 30 modified skill points in more than one primary skill such as magery, necromancy, mysticism, ninjitsu, bushido, animal taming, musicianship, chivalry or spellweaving. Also no more than 30 modified skill points in the associated secondary skill such as evaluate intelligence, spirit speaking, focus, imbuing. There is no cap to spell damage increase in PvM. This property is most commonly found on accessories and spellbooks.
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| type = Magic
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}}
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'''Spell Damage Increase''' (SDI) is an [[item property]] that increases the damage of most magical attacks that are cast. The increase is a true conversion; a 10% increase means the spell damage is increased by 10% and so on. The intensity range of the Spell Damage Increase item property is 1% to 18% for found rings and bracelets. The apparent maximum is 50% for special items (e.g., [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]]).
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Spell Damage Increase is not as straightforward as it seems, as it doesn't apply to all spells. For example, it works with [[Word of Death]], as the spell is not dependent on a secondary ability check, but it doesn't work with [[Pain Spike]], which involves [[Spirit Speak]], or [[Holy Light]], which involves [[Karma]].
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{{tocright}}
 
{{tocright}}
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==Caps==
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===PvP===
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This property is capped at 25% in [[PvP]] provided the character doesn't have more than 30.0 modified skill points in another main skill set; otherwise, the SDI PvP cap will be 20%. Main skills include: [[Magery]], [[Necromancy]], [[Mysticism]], [[Ninjitsu]], [[Bushido]], [[Animal Taming]], [[Musicianship]], [[Chivalry]], [[Spellweaving]]. For example, a character with [[Imbuing]], Mysticism, and Focus is a focused mystic and has a cap of 25%, but if that character also has 31 in [[Evaluating Intelligence]], they are not focused and have a cap of 20%.
  
'''Spell Damage Increase''' (SDI) is an [[item property]] that increases the damage of most magical attacks that are cast. This property is capped at 25% in [[PVP]] provided you dont have more than 30% of a skill in two different spell lines or [[Animal Taming]] or [[Parry]]. Then, you will become "focused" to that spell line and can display it from your titles menu, under overhead name, skills. So, if you have [[Imbuing]], [[mysticism]] and [[focus]] you can be a focused mystic, but not if you have [[mysticism]] and 31 in [[evaluating intelligence]]. It's noteworthy that [[chivalry]] is amongst the magical lines even though it has no spell affected by SDI. So, if you have 120 [[magery]] and 120 [[chivalry]], you won't be a focused mage. If you are not eligible to be focused, then your SDI pvp cap will be 20%.
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It's noteworthy that Chivalry is amongst the magical lines even though it has no spell affected by SDI.
For [[PvE]] there is no cap on spell damage, so pack it on. 
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'''Note:''' The official in-game description (used in the infobox) has outdated information, and the caps listed above are correct. The PvP caps were changed with [[Publish 96]].
  
There is no formula needed for Spell Damage Increase because it is a true conversion, a 10% increase means your spell damage is increased 10% and so on. The intensity range of the Spell Damage Increase item property is 1% to 18% for found rings and bracelets. The apparent maximum is 50% for special items (e.g., [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]]).
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===PvM===
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In [[PvM]], SDI is capped at 250. However, actual spell damage can increase further through modifiers, such as [[slayer]]s or special monster vulnerabilities.<ref>[[Five on Friday - September 11, 2026]]</ref>
  
==Qualifiers==
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==Calculating spell damage==
As with most code over time, Spell Damage Increase is not as straight-forward as it seems. It does affect [[Poison Strike]] and [[Wither]], but it does not affect [[Pain Spike]] or [[Holy Light]]. It works with [[Word of Death]], as the spell is not dependent on a secondary ability check, ''e.g.'' like Pain Spike, which involves [[Spirit Speak]], or Holy Light, which involves [[Karma]].
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===Skills and stats===
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A character's skill level in [[Evaluating Intelligence]] is the first thing that comes into play in calculating the [[magery]] base spell damage. The formula for how much spell damage is contributed by Evaluating Intelligence is this: <code>((Evaluating Intelligence * 3) / 100) + 1</code> This is similar with [[Spirit Speak]] for [[Necromancy Spells]] and [[Focus]] or [[Imbuing]] for [[Mysticism|Mysticism Spells]], [[Arcane Focus]] for [[Spellweaving|Spellweaving Spells]].
  
==Calculating Spell Damage==
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The next factor involved in spell damage is [[intelligence]]. The formula for this is a 1% spell damage increase for every 10 points of intelligence, or <code>(intelligence / 10)</code>, and drop the decimals.
* A character's skill level of [[evaluating intelligence]] is the first thing that comes into play in calculating the [[magery]] base spell damage. The formula for how much spell damage your getting from your Evaluating Intelligence is this: ((evaluating intelligence * 3) / 100) + 1.
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* Similar with [[Spirit Speak]] for [[Necromancy Spells]] and [[Focus]] or [[Imbuing]] for [[Mysticism|Mysticism Spells]], [[Arcane Focus]] for [[Spellweaving|Spellweaving Spells]].
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* The next factor involved in spell damage is [[intelligence]]. The formula for this is 1% spell damage increase for every 10 points of intelligence, or (intelligence / 10) and drop the decimals.
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* [[Spellweaving]] spells [[Arcane Empowerment]] and [[Reaper Form]] increase spell damage.
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* A bards [[Inspire]] (giving SDI) & [[Invigorate]] (giving intelligence) buffs the spell damage and too.
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* [[Races#Berserk|Berserk]] ability of the gargoyle race may increase SDI (up to 12%).
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* Getting the [[City_Loyalty#Trade_Deals_Include|Guild of Arcane Arts trade deal city buff]] increases the SDI value by 5%
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* [[Inscription]] Skill bonus.  This is a 10% increase in the base damage for [[Magery Spells]]. (This bonus only takes effect when a character has achieved the level of Grandmaster or higher in Inscription.)
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* Being cursed by a target's [[Blood Oath]].
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* Factor in any SDI imparted from items.
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* Factor the use of a Slayer spellbook property matching the target.
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* Don't forget the well timed usage of an [[Spell Focusing Sash]].
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* Last but not least, the [[Summer Dragonfish Pie]] gives a straight +5 spell damage and the [[Grapes of Wrath]] gives +15 spell damage.
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On the other hand factor in resist lowering and additional damage received issues on the target like:
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The [[Inscription]] skill gives a 10% increase in the base damage for [[Magery spell]]s. This bonus only takes effect when a character has achieved Grandmaster or higher skill level in Inscription.
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===Spells and abilities===
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[[Spellweaving]] spells [[Arcane Empowerment]] and [[Reaper Form]] increase spell damage. A bard's [[Inspire]] (giving SDI) & [[Invigorate]] (giving intelligence) buff spell damage. The [[Races#Berserk|berserk]] ability of the [[gargoyle]] race may increase SDI (up to 12%). Getting the [[City Loyalty#Trade Deals Include|Guild of Arcane Arts trade deal city buff]] increases the SDI value by 5%. Being cursed by a [[Blood Oath]] increases a player's spell damage but also applies the same amount of damage dealt back to the player.
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===Items===
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Factor in any SDI imparted from items and the use of a Slayer spellbook property matching the target. A well-timed usage of an [[Spell Focusing Sash]] can provide a boost. The [[Summer Dragonfish Pie]] gives a straight +5 spell damage, and the [[Grapes of Wrath]] gives +15 spell damage.
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On the other hand, factor in resistance lowering and additional damage-received issues on the target, like:
  
 
* [[Discordance]]
 
* [[Discordance]]
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* [[Curse]]
 
* [[Curse]]
  
==SDI Items==
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==SDI items==
===Heads===
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===Head===
*[[The Scholar’s Halo]] 15%
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* [[The Scholar's Halo]] 15%
*[[Wizard's Crystal Reading Glasses]] 15%
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* [[Wizard's Crystal Reading Glasses]] 15%
*[[Kasa of the Raj-In]] 12%
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* [[Kasa of the Raj-In]] 12%
*[[Dr. Spector's Lenses]] 12%
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* [[Dr. Spector's Lenses]] 12%
*[[Treasures and Trinkets Reading Glasses]] 10%
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* [[Treasures and Trinkets Reading Glasses]] 10%
*[[Hat of the Magi]] 10%
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* [[Hat of the Magi]] 10%
*[[Crown of Tal'Keesh]] 10%
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* [[Crown of Tal'Keesh]] 10%
*[[Crown of Arcane Temperament]] 8%
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* [[Crown of Arcane Temperament]] 8%
*[[Obsidian Earrings]] 8%
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* [[Obsidian Earrings]] 8%
  
===Necks===
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===Neck===
*[[Pendant of the Magi]] 5%
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* [[Pendant of the Magi]] 5%
  
===Chests===
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===Chest===
*[[Mantle of the Fallen]] 5%
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* [[Mantle of the Fallen]] 5%
*[[Protector of the Battle Mage]] 5%
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* [[Protector of the Battle Mage]] 5%
*[[Shugenja’s Raiment]] 5%
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* [[Shugenja's Raiment]] 5%
  
 
===Legs===
 
===Legs===
*[[Spell Woven Britches]] 10%
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* [[Spell Woven Britches]] 10%
*[[Enchanted Kelp Woven Leggings]] 8%
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* [[Enchanted Kelp Woven Leggings]] 8%
*[[Summoner's Kilt]] 5%
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* [[Summoner's Kilt]] 5%
  
 
===Arms===
 
===Arms===
*[[Cuffs of the Archmage]] 20%
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* [[Cuffs of the Archmage]] 20%
*[[Midnight Bracers]] 10%
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* [[Midnight Bracers]] 10%
  
 
===Robes===
 
===Robes===
*[[Mantle Of The Archlich]] 8%
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* [[Mantle Of The Archlich]] 8%
*[[Hawkwind's Robe]] 5%
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* [[Hawkwind's Robe]] 5%
*[[Tabard of Virtue]] 5%
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* [[Tabard of Virtue]] 5%
*[[Cloak Of Death]] 3%
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* [[Cloak Of Death]] 3%
  
 
===Cloaks===
 
===Cloaks===
*[[Shadow Reaver Cloak]] 6%
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* [[Shadow Reaver Cloak]] 6%
*[[Jumu’s Sacred Hide]] 5%
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* [[Jumu's Sacred Hide]] 5%
*[[Ranger's Cloak of Augmentation]] 3%
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* [[Ranger's Cloak of Augmentation]] 3%
  
 
===Sets===
 
===Sets===
*[[Elven Leafweave]] 15% (total from 4 pieces)
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* [[Elven Leafweave]] 15% (total from 4 pieces)
*[[Greymist Armor]] 8% (2% per from 4 pieces)
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* [[Greymist Armor]] 8% (2% per piece from 4 pieces)
  
 
===Rings===
 
===Rings===
*[[Compassion's Eye]] 20%
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* [[Compassion's Eye]] 20%
*[[Crystalline Ring]] 20%
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* [[Crystalline Ring]] 20%
*A ring out of the [[Random_Magic_Item_Generation_System#The_Name_Prefixes_and_Suffixe|Random Magic Item Generation System]] max. 18%
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* A ring out of the [[Random_Magic_Item_Generation_System#The_Name_Prefixes_and_Suffixe|Random Magic Item Generation System]] max. 18%
*An [[Spell_Damage_Increase#Imbuing|imbued ring]] max. 12%
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* An [[Spell_Damage_Increase#Imbuing|imbued ring]] max. 12%
*[[Ring of the Soulbinder]] 10%
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* [[Ring of the Soulbinder]] 10%
*[[Djinni's Ring]] 10%
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* [[Djinni's Ring]] 10%
*[[Ecru Citrine Ring]] (random, max seen 8%)
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* [[Ecru Citrine Ring]] (random, max seen 8%)
  
 
===Bracelets===
 
===Bracelets===
*A bracelet out of the [[Random Magic Item Generation System#The_Name_Prefixes_and_Suffixes|Random Magic Item Generation System]] max. 18%
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* A bracelet out of the [[Random Magic Item Generation System#The_Name_Prefixes_and_Suffixes|Random Magic Item Generation System]] max. 18%
*An [[Spell_Damage_Increase#Imbuing|imbued bracelet]] max. 12%
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* An [[Spell_Damage_Increase#Imbuing|imbued bracelet]] max. 12%
*[[Enchanted Coral Bracelet]] 10%
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* [[Enchanted Coral Bracelet]] 10%
*[[Venom]] 10%
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* [[Venom]] 10%
  
 
===Talismans===
 
===Talismans===
*[[Mana Phasing Orb]] 5%
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* [[Mana Phasing Orb]] 5%
*[[Mystic's Memento]] 5%
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* [[Mystic's Memento]] 5%
*[[Necromancer's Phylactery]] 5%
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* [[Necromancer's Phylactery]] 5%
*[[Wizard's Curio]] 5%
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* [[Wizard's Curio]] 5%
*[[Serpent’s Bite]] 8%
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* [[Serpent's Bite]] 8%
  
 
===Earrings===
 
===Earrings===
*[[Yukio's Glass Earrings]] 15%
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* [[Yukio's Glass Earrings]] 15%
  
 
===Books===
 
===Books===
 
The relative effective %Damage output is in parentheses to set the order.
 
The relative effective %Damage output is in parentheses to set the order.
*(330) A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] max. 30%, triple damage
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* (330) A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] max. 30%, triple damage
*(325) A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Scrapper's Compendium]] 25%, triple damage
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* (325) A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Scrapper's Compendium]] 25%, triple damage
*(315) [[Anon's Spellbook]] 15% (Dinosaur, Myrmidex or Eodon Tribe Slayer, triple damage)
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* (315) [[Anon's Spellbook]] 15% (Dinosaur, Myrmidex or Eodon Tribe Slayer, triple damage)
*(309) A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Inscription|Inscribed Spellbook]] max. 9%, triple damage
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* (309) A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Inscription|Inscribed Spellbook]] max. 9%, triple damage
*(230) A target specific [[Slayer#Super_.26_Lesser_Slayers|Super Slayer]] [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] max. 30%, double damage
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* (230) A target specific [[Slayer#Super_.26_Lesser_Slayers|Super Slayer]] [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] max. 30%, double damage
*(225) A target specific [[Slayer#Super_.26_Lesser_Slayers|Super Slayer]] [[Scrapper's Compendium]] 25%, double damage
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* (225) A target specific [[Slayer#Super_.26_Lesser_Slayers|Super Slayer]] [[Scrapper's Compendium]] 25%, double damage
*(215) [[Juo’nar’s Grimoire]] 15% ([[Slayer|Super Slayer]], double damage)
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* (215) [[Juo’nar’s Grimoire]] 15% ([[Slayer|Super Slayer]], double damage)
*(215) [[Conjurer's Grimoire]] 15%, Undead Slayer, double damage
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* (215) [[Conjurer's Grimoire]] 15%, Undead Slayer, double damage
*(210) [[Fallen Mystic's Spellbook]] 10% ([[Fey_Slayer|Fey Slayer]], double damage)
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* (210) [[Fallen Mystic's Spellbook]] 10% ([[Fey_Slayer|Fey Slayer]], double damage)
*(209) A target specific [[Slayer#Super_.26_Lesser_Slayers|Super Slayer]] [[Inscription|Inscribed Spellbook]] max. 9%, double damage
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* (209) A target specific [[Slayer#Super_.26_Lesser_Slayers|Super Slayer]] [[Inscription|Inscribed Spellbook]] max. 9%, double damage
*(150) Maximum vs creatures with no slayer vulnerability [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] max. 50%
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* (150) Maximum vs creatures with no slayer vulnerability [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] max. 50%
*(130) [[War of Shadows|War of Shadows Invasion Spellbooks]] max. 30%
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* (130) [[War of Shadows|War of Shadows Invasion Spellbooks]] max. 30%
*(125) [[Scrapper's Compendium]] 25%
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* (125) [[Scrapper's Compendium]] 25%
*(115) [[Tome of Lost Knowledge]] 15%
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* (115) [[Tome of Lost Knowledge]] 15%
*(110) [[Tome of Enlightenment]] 10%
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* (110) [[Tome of Enlightenment]] 10%
*(109) An [[Inscription|Inscribed Spellbook]] max. 9%
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* (109) An [[Inscription|Inscribed Spellbook]] max. 9%
  
 
If the goal is maximum damage, using a slayer spellbook to match your target is clearly the most important element. These are crafted spellbooks with 0 SDI just to make the damage comparison clear.
 
If the goal is maximum damage, using a slayer spellbook to match your target is clearly the most important element. These are crafted spellbooks with 0 SDI just to make the damage comparison clear.
 
No additional SDI, but slayer books:
 
No additional SDI, but slayer books:
*(300) A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Inscription|Inscribed Spellbook]], triple damage
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* (300) A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Inscription|Inscribed Spellbook]], triple damage
*(200) A target specific [[Slayer#Super_.26_Lesser_Slayers|Super Slayer]] [[Inscription|Inscribed Spellbook]], double damage
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* (200) A target specific [[Slayer#Super_.26_Lesser_Slayers|Super Slayer]] [[Inscription|Inscribed Spellbook]], double damage
  
 
===Shields===
 
===Shields===
*[[Hook's Shield]] 10%
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* [[Hook's Shield]] 10%
  
 
===Weapons===
 
===Weapons===
*[[Eternal Guardian Staff]] 10%
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* [[Eternal Guardian Staff]] 10%
*[[Staff of Power]] 5%
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* [[Staff of Power]] 5%
*[[Breath of the Dead]] 5%
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* [[Breath of the Dead]] 5%
*[[Grim Reaper's Scythe]] 5%
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* [[Grim Reaper's Scythe]] 5%
*[[Rune Blade of Knowledge]] 5%
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* [[Rune Blade of Knowledge]] 5%
  
==Maximum Possible SDI by items==
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==Maximum possible SDI by items==
As of [[Publish 112|June 2022]], the maximum Spell Damage Increase from [[equipment]] is 186%, which is constituted from the following:  
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As of [[Publish 112]] in June 2022, the maximum Spell Damage Increase from [[equipment]] is 186%, which is constituted by the following:  
*[[The Scholar’s Halo]] or [[Wizard's Crystal Reading Glasses]] 15%
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* [[The Scholar's Halo]] or [[Wizard's Crystal Reading Glasses]] 15%
*[[Pendant of the Magi]] 5%
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* [[Pendant of the Magi]] 5%
*[[Protector of the Battle Mage]] 5%
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* [[Protector of the Battle Mage]] 5%
*[[Spell Woven Britches]] 10%
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* [[Spell Woven Britches]] 10%
*[[Cuffs of the Archmage]] 20%
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* [[Cuffs of the Archmage]] 20%
*[[Greymist Armor]] gloves 2%
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* [[Greymist Armor]] gloves 2%
*A bracelet out of the [[Random Magic Item Generation System]] 18%
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* A bracelet out of the [[Random Magic Item Generation System]] 18%
*Either [[Compassion's Eye]] or [[Crystalline Ring]] 20%
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* Either [[Compassion's Eye]] or [[Crystalline Ring]] 20%
*Any one of the talisman slot items: [[Mana Phasing Orb]], [[Necromancer's Phylactery]], [[Mystic's Memento]], [[Wizard's Curio]] 5%
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* Any one of the talisman slot items: [[Mana Phasing Orb]], [[Necromancer's Phylactery]], [[Mystic's Memento]], [[Wizard's Curio]] 5%
 
(**A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] 30%, triple damage)
 
(**A target specific [[Slayer#Super_.26_Lesser_Slayers|Lesser Slayer]] [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] 30%, triple damage)
*A [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] 50%
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* A [[Shattered Obelisk Invasion|Shattered Obelisk Invasion Spellbook]] 50%
*[[Hawkwind's Robe]] 5%
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* [[Hawkwind's Robe]] 5%
*[[Shadow Reaver Cloak]] 6%
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* [[Shadow Reaver Cloak]] 6%
*[[Hook's Shield]] 10%
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* [[Hook's Shield]] 10%
*[[Yukio's Glass Earrings]] 15%
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* [[Yukio's Glass Earrings]] 15%
  
 
==Imbuing==
 
==Imbuing==
 
The following resources are required to [[Imbuing|imbue]] the highest intensity of Spell Damage Increase (12%):
 
The following resources are required to [[Imbuing|imbue]] the highest intensity of Spell Damage Increase (12%):
*5 [[Enchanted Essence]]
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* 5 [[Enchanted Essence]]
*10 [[Gem|Emerald]]
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* 10 [[Gem|Emerald]]
*10 [[Crystal Shards]]
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* 10 [[Crystal Shards]]
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==Publishes==
 +
* {{Publish 96|note=Increased PvP spell damage increase cap to 20%.<br>Focus Spec spell damage increase cap reduced from 30% to 25%.}}
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* {{Publish 71|note=Increase of Spell Damage Increase cap from 15% to 30% (Reduced from TC 40%) for templates that focus in only one spell school. Focused players, having no more than 30.0 modified skill points in another main skill set will be able to benefit from the raised cap. Main skills include: Magery, Necromancy, Mysticism, Ninjitsu, Bushido, Animal Taming, Musicianship, Chivalry, Spellweaving.}}
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==References==
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<references/>
  
==See Also==
 
 
{{Item Properties}}
 
{{Item Properties}}

Latest revision as of 08:27, 20 September 2026

Spell Damage Increase
This property increases the damage for most magical attacks that are casted. While the property is normally capped at 15% in PvP, the cap can be further increased to 30% for focused templates. Focus templates have no more than 30 modified skill points in more than one primary skill such as magery, necromancy, mysticism, ninjitsu, bushido, animal taming, musicianship, chivalry or spellweaving. Also no more than 30 modified skill points in the associated secondary skill such as evaluate intelligence, spirit speaking, focus, imbuing. There is no cap to spell damage increase in PvM. This property is most commonly found on accessories and spellbooks.
Property type: Magic

Spell Damage Increase (SDI) is an item property that increases the damage of most magical attacks that are cast. The increase is a true conversion; a 10% increase means the spell damage is increased by 10% and so on. The intensity range of the Spell Damage Increase item property is 1% to 18% for found rings and bracelets. The apparent maximum is 50% for special items (e.g., Shattered Obelisk Invasion Spellbook).

Spell Damage Increase is not as straightforward as it seems, as it doesn't apply to all spells. For example, it works with Word of Death, as the spell is not dependent on a secondary ability check, but it doesn't work with Pain Spike, which involves Spirit Speak, or Holy Light, which involves Karma.

Caps

PvP

This property is capped at 25% in PvP provided the character doesn't have more than 30.0 modified skill points in another main skill set; otherwise, the SDI PvP cap will be 20%. Main skills include: Magery, Necromancy, Mysticism, Ninjitsu, Bushido, Animal Taming, Musicianship, Chivalry, Spellweaving. For example, a character with Imbuing, Mysticism, and Focus is a focused mystic and has a cap of 25%, but if that character also has 31 in Evaluating Intelligence, they are not focused and have a cap of 20%.

It's noteworthy that Chivalry is amongst the magical lines even though it has no spell affected by SDI.

Note: The official in-game description (used in the infobox) has outdated information, and the caps listed above are correct. The PvP caps were changed with Publish 96.

PvM

In PvM, SDI is capped at 250. However, actual spell damage can increase further through modifiers, such as slayers or special monster vulnerabilities.[1]

Calculating spell damage

Skills and stats

A character's skill level in Evaluating Intelligence is the first thing that comes into play in calculating the magery base spell damage. The formula for how much spell damage is contributed by Evaluating Intelligence is this: ((Evaluating Intelligence * 3) / 100) + 1 This is similar with Spirit Speak for Necromancy Spells and Focus or Imbuing for Mysticism Spells, Arcane Focus for Spellweaving Spells.

The next factor involved in spell damage is intelligence. The formula for this is a 1% spell damage increase for every 10 points of intelligence, or (intelligence / 10), and drop the decimals.

The Inscription skill gives a 10% increase in the base damage for Magery spells. This bonus only takes effect when a character has achieved Grandmaster or higher skill level in Inscription.

Spells and abilities

Spellweaving spells Arcane Empowerment and Reaper Form increase spell damage. A bard's Inspire (giving SDI) & Invigorate (giving intelligence) buff spell damage. The berserk ability of the gargoyle race may increase SDI (up to 12%). Getting the Guild of Arcane Arts trade deal city buff increases the SDI value by 5%. Being cursed by a Blood Oath increases a player's spell damage but also applies the same amount of damage dealt back to the player.

Items

Factor in any SDI imparted from items and the use of a Slayer spellbook property matching the target. A well-timed usage of an Spell Focusing Sash can provide a boost. The Summer Dragonfish Pie gives a straight +5 spell damage, and the Grapes of Wrath gives +15 spell damage.

On the other hand, factor in resistance lowering and additional damage-received issues on the target, like:

SDI items

Head

Neck

Chest

Legs

Arms

Robes

Cloaks

Sets

Rings

Bracelets

Talismans

Earrings

Books

The relative effective %Damage output is in parentheses to set the order.

If the goal is maximum damage, using a slayer spellbook to match your target is clearly the most important element. These are crafted spellbooks with 0 SDI just to make the damage comparison clear. No additional SDI, but slayer books:

Shields

Weapons

Maximum possible SDI by items

As of Publish 112 in June 2022, the maximum Spell Damage Increase from equipment is 186%, which is constituted by the following:

(**A target specific Lesser Slayer Shattered Obelisk Invasion Spellbook 30%, triple damage)

Imbuing

The following resources are required to imbue the highest intensity of Spell Damage Increase (12%):

Publishes

  • Publish 96 (9 Feb 2017): Increased PvP spell damage increase cap to 20%.
    Focus Spec spell damage increase cap reduced from 30% to 25%.
  • Publish 71 (21 Jul 2011): Increase of Spell Damage Increase cap from 15% to 30% (Reduced from TC 40%) for templates that focus in only one spell school. Focused players, having no more than 30.0 modified skill points in another main skill set will be able to benefit from the raised cap. Main skills include: Magery, Necromancy, Mysticism, Ninjitsu, Bushido, Animal Taming, Musicianship, Chivalry, Spellweaving.

References

  1. Five on Friday - September 11, 2026