Mimic

The mimic adheres to anything that touches it. A Huge or smaller creature adhered to the mimic has the Grappled condition (escape DC 13). Ability checks made to escape this grapple have Disadvantage.

with Advantage if the target is Grappled by the mimic. 7 (1d8 + 3) Piercing damage—or 12 (2d8 + 3) Piercing damage if the target is Grappled by the mimic—plus 4 (1d8) Acid 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.

The mimic shape-shifts to resemble a Medium or Small object while retaining its game statistics, or it returns to its true blob form. Any equipment it is wearing or carrying isn’t transformed.