From Pathfinder Lost Omens Impossible Lands, which isn't enabled.

Moderate Enhance Venom

FEAT 9

You upgrade the vishkanyan venom you can apply with Envenom to moderate vishkanyan venom. Envenom's frequency becomes once per 10 minutes.

Moderate Vishkanyan Venom (level 9)

Frequency once per 10 minutes

Saving Throw Fortitude

Maximum Duration 6 rounds

Stage 1 3d6 poison damage (1 round)

Stage 2 4d6 poison damage (1 round)

Stage 3 5d6 poison damage (1 round)

Pathfinder Lost Omens Impossible LandsOGL