pf2e.fyi
From Pathfinder Howl of the Wild, which isn't enabled.

Emit Defensive Odor

FEAT 1
Activity 1 action

Frequency once per day

While athamarus' natural pheromones are typically used for communication, you have developed yours into a defense mechanism to ward off foes. You emit a thick spray of defensive pheromones at an adjacent creature, who takes (((your level + 1) ÷ 2, rounded down) + 1)d6 poison damage with a basic Fortitude save against your class DC.

At 3rd level and every 2 levels thereafter, the damage increases by 1d6.

Pathfinder Howl of the WildORC