Bumbi the Christmas Mimic

Shapechanger. Bumbi the Christmas Mimic can use his action to polymorph into a Christmas related object 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). Bumi the Christmas Mimic adheres to anything that touches him. A Huge or smaller creature adhered to the mimic is also grappled by it (escape DC 13). Ability checks made to escape this grapple have disadvantage.

False Appearance (Object Form Only). While Bumbi the Christmas Mimic remains motionless, he is indistinguishable from an ordinary object.

Grappler. Bumbi the Christmas Mimic has advantage on attack rolls against any creature [incapitated]grappled[/condition] by it.

Relentless (Recharges after a Short or Long Rest). If Bumbi the Christmas Mimic takes 14 damage or less that would reduce him to 0 hit points, he is reduced to 1 hit point instead of 0.

Messy End. Bumbi the Christmas Mimic explodes 3 rounds after it dies, or immediately if it was killed by a critical hit. The explosion destroys Bumbi the Christmas Mimic's body, leaving its equipment behind. Each creature within 5 feet of the exploding Bumbi the Christmas Mimic must make a DC 10 Dexterity saving throw, taking 4 (1d8) bludgeoning damage on a failed save, or half as much damage on a successful one.

Relentless. At the start of his turn, Bumbi the Christmas Mimic can gain advantage on all melee attack rolls he makes during that turn, but attack rolls against him have advantage until the start of his next turn.

Magic Resistance. Bumbi the Christmas Mimic has advantage on saving throws against spells and other magical effects. However, Bumbi has disadvantage on saving throws against radiant damage from spells and other magical effects.

Regeneration. Bumbi the Christmas Mimic regains 5 hit points at the start of his turn as long as he has at least 1 hit point.

Play Dead. When Bumbi the Christmas Mimic's hit points are at 5 or lower, Bumbi can use an action to Play Dead. While playing dead, Bumbi regains 3 hit points for every player's turn. Bumbi can stop playing dead by using an action. Bumbi will automatically stop playing dead when he has 10 hit points.

Keen Senses. Bumbi the Christmas Mimic has advantage on Wisdom (Perception ) checks that rely on sight, hearing, or smell.

Sunlight Weakness. While in sunlight, Bumbi the Christmas Mimic has disadvantage on attack rolls, ability checks, and saving throws.

Inscrutable. Bumbi the Christmas Mimic is immune to any effect that would sense his emotions or read his thoughts, as well as any divination spell that he refuses. Wisdom (Insight) checks made to ascertain Bumbi's intentions or sincerity have disadvantage.

Legendary Resistance (3/Day). If Bumbi the Christmas Mimic fails a saving throw, it can choose to succeed instead.

Innate Spellcasting.  Bumbi the Christmas Mimic's innate spellcasting ability is Intelligence (spell save DC 14). Bumbi can innately cast the following spells, requiring no components.

At will: Cone of Cold, Detect Evil and Good, Fear, Thorn Whip, Otiluke's Freezing Sphere

1/day each: Dominate Person, Dominate Monster, Wall of Ice, Ice Storm, Hold Monster

Multiattack: Bumbi the Christmas Mimic makes two bite attacks.

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 damage.

Paralyzing Touch. Melee Spell Attack: +12 to hit, reach 5 ft., one creature. Hit: 10 (3d6) cold damage. The target must succeed on a DC 18 Constitution saving throw or be paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Bumbi the Christmas Mimic can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Bumbi regains spent legendary actions at the start of his turn.

Attack. Bumbi the Christmas Mimic makes one bite attack.

Ice Storm. Bumbi the Christmas Mimic innately casts Ice Storm.

Paralyzing Touch (Costs 2 Actions). Bumbi the Christmas Mimic uses his Paralyzing Touch.

Wail (Costs 3 Actions). Bumbi the Christmas Mimic lets out a withering wail. Any creature within 120 feet of Bumbi that can hear the wail must succeed on a DC 19 Constitution saving throw or gain 1 level of exhaustion.