Spell Damage Increase

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Note: The official in-game description (used in the infobox) has outdated information, and the caps listed above are correct.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


Item properties
Stat Modifiers

Dexterity Bonus • Hit Point Increase • Intelligence Bonus • Mana Increase • Stamina Increase • Strength Bonus

Regenerations

Hit Point Regeneration • Mana Regeneration • Stamina Regeneration

Hit Effects

Assassin Honed • Blood Drinker • Battle Lust • Hit Cold Area • Hit Curse • Hit Dispel • Hit Energy Area • Hit Fatigue • Hit Fire Area • Hit Fireball • Hit Harm • Hit Life Leech • Hit Lightning • Hit Lower Attack • Hit Lower Defense • Hit Mana Drain • Hit Mana Leech • Hit Physical Area • Hit Poison Area • Searing Weapon • Splintering Weapon • Hit Stamina Leech

Historic

Ruin • Force • Might • Mystic • Power • Vanquishing • Newbified

Damage Types

Physical Damage • Fire Damage • Cold Damage • Poison Damage • Energy Damage • Chaos Damage • Direct Damage

Magic

Casting Focus • Faster Casting • Faster Cast Recovery • Lower Mana Cost • Lower Reagent Cost • Mage Armor • Mage Weapon • Resonance • Spell Channeling • Spell Damage Increase • Spell Focusing • Spell Consumption

Weapon

Damage Increase • Swing Speed Increase • Use Best Weapon Skill • Weapon Speed • Hit Chance Increase

Archery

Balanced • Damage Modifier • Lower Ammo Cost • Range • Velocity

Death & Theft Blessed • Cursed • No-Drop/No-Trade • Insured • Owned By
Damage Dealing

Damage Eater • Rage Focus • Reactive Paralyze • Reflect Physical Damage • Soul Charge

Other

Artifact Rarity • Defense Chance Increase • Durability • Elves Only • Enhance Potions • Gargoyles Only • Lifespan • Lower Requirements • Luck • Mana Burst • Mana Phase • Night Sight • Self Repair • Shard Bound • Skill Bonus • Strength Requirement • Uses Remaining • Weight

Negative

Antique • Brittle • Cursed • Ephemeral • Prized • Massive • Unwieldy • Unlucky •

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