Composite Mimic

Morphing Form. At the start of each of it's turns, roll a d6. This will determine the base damage type it's pseudopod attack does on this turn.

Amorphous. This creature can fit through space as small as 1 inch wide.

Attack. The composite mimic can make one attack, depending on the damage type rolled on the Morphling Form table.

Sword. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 8 (1d6 + 4) slashing damage and 8 (2d6) acid damage.

Longbow. Ranged Weapon Attack: +5 to hit, range 60 ft., 1 target. Hit: 9 (1d10 + 3) piercing damage and 8 (2d6) acid damage.

Flamethrower. The composite mimic spews fire in a 15 ft line that is 5 ft wide. Any creatures in that line must make a Dexterity saving throw (DC 13), taking 13 (3d6) fire damage on a failed save, or half as much on a successful one.

Acidic Bomb. A creature within range (20 ft) must make a Dexterity saving throw (DC 13), taking 15 (3d8) acid damage on a failed save, or half as much on a successful one.

Dervish Force. Any creature within 10 ft must make a Strength saving throw (DC 13), taking 4 (1d6) force damage and being blown back 10 ft and knocked prone. A creature who succeeds on the save takes half as much damage and is not blown back.

Cold Snap. Any creature within 15 ft must make a Constitution saving throw (DC 13), taking 7 (2d6) cold damage on a failed save, or none on a successful one. Any creature concentrating on a spell within this area must make a successful Constitution saving throw (DC 13) or lose concentration if they did not take damage.

Mimicking Form. As a reaction, after a creature attacks it with a weapon attack, the composite mimic may make the same attack against the attacker. If the attack hits, roll the damage used for the weapon and an additional 7 (2d6) acid damage.