Pathfinder 2e Action / Feat: Banishing Fist

Requirements Dominion of Will
Trigger Both Strikes from Flurry of Blows hit the same creature and deal damage.

Description The focused power of your flurry threatens to banish your opponent. When you target the same creature with two Strikes from your Flurry of Blows, you can try to banish the creature. If both Strikes hit the creature and deal damage, the target must attempt a Will save against your Class DC.
Degrees of Performance
Critical Success: The target is unaffected.
Success: The target is Stunned 1.
Failure: The target is banished to a harmless demiplane until the end of its next turn.
Critical Failure: The target is banished to a harmless demiplane for one minute.