Shapechanger. The mimic can use its action to polymorph into a pumpkin or jack-o'-lantern, 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 (Object Form Only). The mimic adheres to anything that touches it. A Huge or smaller creature adhered to the mimic is also grappled by it (escape DC 12). 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 pumpkin or jack-o'-lantern.

Grappler. The mimic has advantage on attack rolls against any creature grappled by it, and a creature grappled by the mimic has disadvantage on saving throws against the mimic's attacks.

Illumination (Object Form Only). The mimic sheds dim light in a 30-foot radius.

Pseudopod. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) bludgeoning damage. If the mimic is in object form, the target is subjected to its Adhesive trait.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) piercing damage plus 4 (1d8) acid or fire damage.

Breath Weapons (Recharge 5–6). The mimic uses one of the following breath weapons.

Fire Breath. The mimic exhales fire in a 15-foot cone. Each creature in that area must make a DC 13 Dexterity saving throw, taking 10 (3d6) fire damage on a failed save, or half as much damage on a successful one.

Spice Breath (Recharge 5–6). The mimic exhales a cloud of powdered spices in a 15-foot cone.  Each creature in that area must make a DC 13 Constitution saving throw or become unable to breathe, while coughing uncontrollably.  A creature affected in this way is blinded, incapacitated, and suffocating. As long as it is conscious, a creature can repeat the saving throw at the end of each of its turns, ending the effect on it on a success. The lesser restoration spell can also end all these effect on a creature.  A creature can also spend an action to clean the powder out of their eyes, ending the blinded condition.

Regardless of the result of its saving throw, a creature in the area of the spice breath smells strongly of pumpkin spice for the next 3 hours.  Creature attempting to detect the creature have advantage on Wisdom (Perception) checks relying on smell.