Chungus

3 Headed Monstrosity. Has 3 Heads, each head may choose to take an Action a Bonus Action or a Reaction, allowing it to preform multiple of the same in a round.

Psychic Explosion: When this creatures drops to 0HP all creatures within 10ft must makes a DC 16 Intelligence Save or take 2d10 Psychic Damage

Aura of Psionics: Has a 10ft Aura all Creatures within gain Advantage on Intelligence Saves and gain Resistance to Psychic Damage.

Chomp. Melee Weapon Attack, 1 target, 5ft range, 1d20+9 to hit, 2d6+4 Piercing and 2d6 Psychic Damage

Mind-shattering Roar. (Recharge 5 or 6) All creatures within 10ft must make a DC 18 Save with there spellcasting ability, on a fail they cannot cast spells on their next turn.

Psionic Breath: Each creature of Chungus's choice within a 20ft Cone makes a DC 18 Intelligence Save on a fail they take 5d8+3 Psychic Damage of half as much on a success 

Psionic Recovery: (3/Day) roll 1d6, restore a spell slot up to that level to a creature within 30ft.

Charge: Double both this creature and its riders movement speed this turn.

Psionic Blast: Ranged Spell Attack, 1 target, 60ft range, 1d20+9 to hit, 2d10 Psychic Damage.

Psionic Shell. When a creature within 30ft of you is the target of an attack, increase its AC by 3 until the end of turn, if an attack still hits, the attack takes 6 Psychic Damage.

Warp Reality: At the start of any creatures turn, may choose to teleport itself and its rider up to 30ft in any direction.

Snap: when a creature moves into range, make 2 Chomp attacks against it