pf2e.fyi
From Pathfinder Impossible Magic, which isn't enabled.

Desperate Surge

FEAT 10
Activity 1 action

Frequency once per 10 minutes

You can conjure up at will the kind of strength that most beings only attain in life-or-death situations. You can attempt to Grapple, Reposition, Shove, or Trip a creature using a spell attack roll instead of an Athletics check.

You can recharge this ability early by making an unarmed Strike to destroy one of your thralls within your reach.

Pathfinder Impossible MagicORC