## Caustic Adaptation *Long have your ancestors hunted and been hunted in the depths. Natural selection has given your blood an unpalatable, acidic quality.* **Prerequisite:** Canthar **Benefit:** A creature that makes a successful bite attack against you takes must make a fortitude save (DC 10 + 1/2 your character level + your Constitution modifier) or be sickened for 1d4 rounds. Creatures immune to poison are immune to this effect.