Cartoon Cat

Cartoon's Cannot Die (Mythic Trait; Recharges after a Short or Long Rest). If Cartoon Cat is reduced to 0 hit points, it doesn’t die or fall unconscious. Instead, it regains 200 hit points. In addition, depending on how many arms it has, more than two, it restores one of it's expended uses of it's innate spellcasting trait. It appears to be in a state of agony filled melting as it tries to stay alive.

Amorphous. The Cartoon Cat can move through a space as narrow as 1 inch wide without squeezing.

Regeneration. The creature regains 20 hit points at the start of its turn if it has 1 at least 1 hit point. It dies and doesn't regenerate if it is reduced to 0 hit points. 

Immutable Form. The Cartoon Cat is immune to any spell or effect that would alter its form.

Cartoonish Contortion. As an action, the Cartoon Cat can change it's size category from Tiny to Huge, it gains the benefits and detriments of that size category until it chooses to change size category once more. At the end of each turn, it grows another arm, adding another grab attack to it's Multiattack unless it is dealt radiant damage or a critical hit on that round.

Shapechanger. As an action it can change it's shape appear as a more friendly cartoonish cat, or look any level more grotesque and corrupted.

Magic Resistance. The Cartoon Cat has advantage on saving throws against spells and other magical effects.

Innate Spellcasting. It's spellcasting ability is Charisma (+10 spell attack, and spell save DC 18), it can cast the following spells without material components:

At will: mind sliver (3d6), dissonant whispers (2nd level), phantasmal force

3/day each: bane (3rd level), tasha's mind whip (5th level), fear

1/day each: phantasmal killer (5th level), mental prison

Multiattack. Cartoon Cat can either make two attacks, one grab and one bite attack as an action.

Grab. Melee Weapon Attack: +12 to hit, reach 40 ft., 2 target. Hit: 23 (3d8 + 7) bludgeoning damage, the creature hit if it is Medium sized or smaller then must make a DC 14 Strength saving throw, being grappled in an enlarged Huge-sized Cartoon Cat hand and take an additional 4 (2d4) bludgeoning damage if it is still grappled at the end of each of it's turn, escape DC is 14. The Huge hand has 20 hit points and an AC of 16, and is immune to all conditions, and immune to psychic, poison, necrotic, and cold damage, it doesn't take up it's space. Creatures with truesight are immune to this attack.

Bite. Melee Weapon Attack: +12 to hit, reach 5 ft., 1 target. Hit: 12 (2d6 + 7) piercing damage.

Crazed Laugh (Recharge 4-6). The Cartoon Cat, filled with dark unknown insane power, laughs in a high pitched and distorted manner. Forcing creatures that aren't undead or constructs within 60ft of the Cartoon Cat to make a DC 20 Wisdom saving throw, taking 30 (6d10) psychic damage and are frightened for 1 minute, they can repeat the save on the start of each of their turns, ending the frightened on a success. On a successful save they take half as much damage and aren't frightened.

The Cartoon Cat 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. The Cartoon Cat regains spent legendary actions at the start of its turn.

Grab (Costs 1 Action). Cartoon can perform the Grab Action.

Chaotic Tune (Costs 2 Actions). It can cast Toll the Dead (4d8 or 4d12) with it's spellcasting Save DC of 18.

If Cartoon Cat’s mythic trait is active, it can use the options below as legendary actions, as long as it is not at maximum hit points

Scream of Psionic Agony (Costs 2 Action). Cartoon Cat forces all creatures that aren't undead or constructs to make a DC 17 Wisdom saving throw, on a failed save the creature takes 18 (6d6) psychic damage and are stunned until the end of their next turn. On a successful save they take half as much damage and aren't stunned.

Syphon Energy (Costs 3 Action). The Cartoon Cat forces a creature it has grappled to make a DC 15 Constitution saving throw, on a failed save the creature takes 10 necrotic damage and the Cartoon Cat heals for that amount. Undead and Constructs are immune to this magic.