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

Greater Enhance Venom

FEAT 17

You upgrade the vishkanyan venom you can apply with Envenom to greater vishkanyan venom. Envenom's frequency becomes once per minute.

Greater Vishkanyan Venom (level 17)

Frequency once per minute

Saving Throw Fortitude

Maximum Duration 6 rounds

Stage 1 7d6 poison damage (1 round)

Stage 2 9d6 poison damage (1 round)

Stage 3 11d6 poison damage (1 round)

Pathfinder Lost Omens Impossible LandsOGL