Kiss of Tsunis

Pharmaceutical (poison—injected or ingested), uncommon

A creature subjected to this poison must succeed on a DC 14 Constitution saving throw or take 10 (3d6) poison damage and become poisoned. The poisoned creature must repeat the saving throw at the start of each of its turns. On each successive failed save, the character takes 1d6 poison damage for every failed save after the initial one (1d6 on the first successive failed saive, 2d6 on the second, etc.). After three successful saves, the creature is no longer poisoned.

A single dose of kiss of tsunis costs 750 gp.