pf2e.fyi
From Pathfinder Dark Archive, which isn't enabled.

Torrential Backlash

FEAT 10
ARCHETYPE
Activity 2 actions
Archetype Curse Maelstrom
Prerequisites Curse Maelstrom Dedication
Requirements You are in a curse maelstrom state.

Calling upon forbidden practices, you release the curse from within yourself, allowing it free rein to destroy everything around you. All creatures within your curse maelstrom emanation except you take 1d6 void damage for each level you have, with a basic Fortitude save. Your curse maelstrom state then ends.

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