From Pathfinder Howl of the Wild, which isn't enabled.

Rend Mimicry

FEAT 4

Activity 1 action

Prerequisites Wild Mimic Dedication; you have seen a creature use Rend or have identified a creature that has Rend in combat

Requirements You have hit the same enemy with two consecutive melee Strikes that each dealt slashing damage.

Taking advantage of the brutal efficiency of hacking away at a target with two slashing attacks, you've mastered the art of punishing a foe caught between your slices. You deal 1d6 (2d6 at level 10, 3d6 at level 16) slashing damage to the target. This damage increases to 2d6 at 10th level and to 3d6 at 16th level.

Pathfinder Howl of the WildORC