Acid is a liquid sand that combines with Pixelium to create Creeper Eater Liquid.
Notable behaviors of acid:
| Liquid sand | Acid • Boomzene • Breeder Liquid • Creeper Eater Liquid • Ixeide • Molten Metal • Oil • Water |
| Falling sand | Sulfur • Nitron |
| Solid sand | Breeder Land • Metal |