Prerequisite: Arcane Strike, Combat Casting, Still Spell, CL 9, BAB +9.

Benefit: When you score a critical strike with a melee weapon you can, as an immediate action, cast a touch-range spell on the same target. The spell must have a casting time of one standard action or less. You can do this even if you do not have a hand free to enact required somatic components. You must make a concentration check to avoid attacks of opportunity normally if you are threatened. You gain a +1 bonus on the save DC of this spell if your weapon has greater than a x2 critical multiplier.

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