You can cast spells from mightier foes.

Prerequisites: Spellthief level 6, Deed (see special)

Benefit: The maximum Caster Level of stolen spells the Spellthief can steal increases by one.

Special: You can take this feat only after surviving an encounter against and successfully stealing a spell from a foe whos caster level was equal to 11+(the number of times you have this feat)*5. The feat has to be taken as the first feat after the encounter. This feat can be taken multiple times