From Pathfinder Lost Omens Tian Xia Character Guide, which isn't enabled.

Polymorphic Escape

FEAT 1

Activity reaction

Trigger You would become Grabbed, Immobilized, Prone, or Restrained.

You polymorph into a tiny vermin, a cloud of leaves, or another shape that allows you to escape. Attempt a DC 16 flat check; on a success, you ignore the triggering effect and can Step. You then return to your humanoid shape.

Pathfinder Lost Omens Tian Xia Character GuideORC