Shapechanger. The mimic can use its action to polymorph into a root vegetable or back into its true, amorphous form. Its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Adhesive. The mimic adheres to anything that touches it. A Medium or smaller creature adhered to the mimic is also grappled by it (escape DC 11). Ability checks made to escape this grapple have disadvantage.

False Appearance (Object Form Only). While the mimic remains motionless, it is indistinguishable from an ordinary, inanimate root vegetable.

Grappler. The mimic has advantage on attack rolls against any creature grappled by it.

Pseudopod. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 1) bludgeoning damage. If the mimic is in object form, the target is subjected to its Adhesive trait.

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 1) piercing damage plus 2 (1d4) acid damage.

Hot Potato. The mimic makes a bite attack against a creature it has grappled and then flings itself up to 20 feet through the air towards another creature it can see.  That creature must make a DC 12 Dexterity saving throw.  On a failed save, the creature takes (1d4 + 1) bludgeoning damage.  If the mimic is in object form, the target is subjected to its Adhesive trait.  On a successful save, the target takes no damage and the mimic falls harmlessly to ground at the target's feet.