Deadly Saliva

Your saliva is insanely strong, even deathly to most creatures except you. You have even learned to use your dangerous drool as an effective weapon in combat. You gain the following benefits:

• You are immune to non-magical poison, poisoning effects, poison damage, and the poisoned condition only when you consume a substance containing one, any, or all of those things, thanks to the powerful acids in your saliva.
• As a bonus action, you can spit at a creature within 10 feet of you, making a ranged attack roll and dealing 1d4 acid damage on a hit. If the creature you hit is vulnerable to acid damage, or if the creature you hit is surprised, then that creature becomes blinded. This blinded effect can be removed by pouring water over the creature's eyes or using magic, otherwise the creature remains blinded for a maximum of 24 hours before your saliva's effect wears off on its own.