Spiteful Rake 
Feat 13ChangelingSource Ancestry Guide pg. 23Prerequisites claw unarmed attack
Requirements You have both hands free.
Your instincts sing of spite and malice, and you've learned a devastating trick: go for the eyes. You make a claw Strike. If you hit and deal damage, the target is
dazzled for 1 round. On a critical hit, the target is instead
blinded for 1 round and dazzled until restored to maximum hit points.
Traits
Changeling: A creature with this trait has the changeling versatile heritage. Changelings are the children of hags and members of other humanoid ancestries. An ability with this trait can be used or selected only by changelings.