Mimic is a Medium monstrosity with neutral alignment and Challenge Rating 2 in the 2024 SRD. This stat block includes AC 12, 58 hit points, speeds, traits, and actions.
Bite - Melee Attack Roll: +5 (with Advantage if the target is Grappled by the mimic), reach 5 ft. Hit: 7 (1d8 + 3) Piercing damage—or 12 (2d8 + 3) Piercing damage if the target is Grappled by the mimic—plus 4 (1d8) Acid damage.
Pseudopod - Melee Attack Roll: +5, reach 5 ft. Hit: 7 (1d8 + 3) Bludgeoning damage plus 4 (1d8) Acid damage. If the target is a Large or smaller creature, it has the Grappled condition (escape DC 13). Ability checks made to escape this grapple have Disadvantage.