Homunculus Poison (poison) A homunculus has one dose of poison in a reservoir in its head. It can refill this poison from its reserves with an Interact action
Saving Throw DC 15 Fortitude
Maximum Duration 6 rounds
Stage 1 1d6 poison and Enfeebled 1 (1 round).
Source: Pathfinder Monster Core
Running this fight? Add the soulbound homunculus to the initiative tracker: type its name and the AC, hit points and Perception for initiative fill in, and the book button shows this stat block mid-fight.