Acid Venom

The Venom debuff is a stronger version of Poisoned which causes you to lose 6 life per second and negating health regeneration.

Immune NPCs

 * All Slimes
 * All Skeletal NPCs (That is: all Undead NPCs, except Zombie, Doctor Bones and The Groom.)
 * All Underground Jungle NPCs
 * All Underground Hallow NPCs
 * All Snowman NPCs
 * All Spider NPCs
 * All Pirate NPCs
 * All Frost Moon NPCs except Nutcracker
 * All Flying Weapon NPCs

Bosses: Other:
 * Eater of Worlds
 * Skeletron
 * Wall of Flesh
 * The Destroyer
 * Skeletron Prime
 * Everscream
 * Plantera
 * Golem
 * Duke Fishron
 * Angry Trapper
 * Bee
 * Man Eater
 * Blazing Wheel
 * Dungeon Guardian
 * Face Monster
 * Floaty Gross
 * Fungi Bulb
 * Gastropod
 * Giant Fungi Bulb
 * Gingerbread Man
 * Ice Elemental
 * Ice Golem
 * Lihzahrd
 * Meteor Head
 * Mimic
 * Mushi Ladybug
 * Paladin
 * Pixie
 * Possessed Armor
 * Snow Balla
 * Snow Flinx
 * Splinterling
 * Wraith
 * Wyvern