Confusing Strike* (Ex)

Prerequisite(s): Investigator 19th level

Benefit: When the investigator deals damage with studied strike, the opponent must succeed at a Fortitude saving throw or become confused for 1d4+1 rounds. A successful saving throw reduces the duration to 1 round. The DC for this Fortitude save is equal to 10 + 1/2 the investigator's level + his Intelligence modifier. Constructs, mindless creatures, oozes, plants, undead, incorporeal creatures, and creatures immune to critical hits are not affected by this ability.