- Caustic Immunity
The user's body is unharmed by and immune to any acids, being completely invulnerable to direct and indirect attacks.
- Black Dragons (AD&D)
- Poko (Marchen Awakens Romance)
- Acidia (DC Comics)
- The Powerpuff Girls (The Powerpuff Girls)
- Venomari (Lego Ninjago: Masters of Spinjitzu)
- The Worst (Ben 10: Omniverse)