Spell Damage Increase

Revision as of 11:59, 30 December 2013 by Kelly (Talk | contribs) (Calculating Spell Damage)

Spell Damage Increase (SDI) is an item property that, surprisingly, increases the damage of most magical attacks that are cast. While this property is capped at 15% for PvP, the cap further increases from 15% to 30% for templates having no more than 30 modified skill points in another main skill like Magery, Necromancy, Mysticism, Focus, Ninjitsu, Bushido, Animal Taming, Musicianship, Chivalry and Spellweaving. For PvE there is no cap on spell damage, so pack it on.

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 30% for special items (e.g., War of Shadows Invasion Spellbooks).


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.

Calculating Spell Damage

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

SDI Items







Maximum Possible SDI by items

As of August of 2012, the maximum Spell Damage Increase from equipment is for an elf 124%, which is constituted from the following:

(**a target specific Lesser Slayer Scrapper's Compendium 25%, triple damage)


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

See Also