From Pathfinder Impossible Magic, which isn't enabled.

Wake and Tremble

FEAT 8

ARCHETYPE PRIMAL

Activity free action

Archetype World Rouser

Prerequisites World Rouser Dedication

Trigger You Rouse the World.

You have the world wake with a great convulsion. All other creatures in the area when you Rouse the World must attempt a Reflex save against your world rouser DC.

Success The creature is unaffected.

Failure The creature falls and lands Prone.

Critical Failure As failure, but the creature also becomes Sickened 1.

Pathfinder Impossible MagicORC