Greater Spell Critical (Combat, Critical)

Your critical hits with spells cause additional magic effects.

Prerequisite: Critical Focus, Spell Critical, Spell Focus, BAB +9, CL 15

Benefit: Select one 1st- or 2nd-level spell you know that affects a single target and is negated with a saving throw. When you score a critical hit with an attack for a spell in a school for which you have Spell Focus, the target is also affected as if you had cast the selected spell upon it. The additional spell effect lasts for its normal duration or 1 minute, whichever is shorter.

Special: You can apply the effects of only one critical feat to a given critical hit unless you possess Critical Mastery.