pf2e.fyi
From Pathfinder Season of Ghosts Hardcover Compilation, which isn't enabled.

Clinging to Life

FEAT 13
RAREREINCARNATED
Activity free action
Frequency once per day
Trigger You're reduced to 0 hit points and don't immediately die.

This life still holds much for you, and you aren't ready to fall back into the River of Souls just yet. When you're reduced to 0 Hit Points and not immediately killed, you go to 1 Hit Point instead, fall Prone, and are Unconscious, and you don't gain the Wounded 1 condition.

Pathfinder Season of Ghosts Hardcover CompilationORC