Arcane mastery

(Complete Arcane, page 73, DnD 3.5)

[General]

You are quick and certain in your efforts to defeat the arcane defenses and spells of others.

Prerequisite

Ability to cast arcane spells or use spelllike abilities (including invocations)

Benefit

You can take 10 on caster level checks (as if the caster level check was a skill check). You can use this feat even while under stress.