Find Weakness (Undead) IV

Feat Description
This feat allows you to find weaknesses in the defense of certain creature types (Undead) for 20 rounds. You can make sneak attacks and critical hits against the target creatures. However, you inflict only one-half your normal sneak attack damage (rounded down) when determining bonus damage for such attacks. This feat has a 180 second cooldown and activation expends 1 use of the Natural Cunning feat.

Find Weakness (Undead) All, Scout Gatekeeper