Cthulubold

Eldritch Evasion. is immune to all damage from abilities that don't specifically target this character.

Spell Storing: Can store a Spell Slot up to its proficiency Bonus and use it to cast any spell from the warlock spell list using your spell casting ability modifier, this slot is wasted if Cthulubold dies.

Eldritch Summing: If Cthulubold dies, it takes 1 hour and 50 gold with of eldritch candles and incense to re-summon him.

Mind Link: Has a telepathic link with its master as long as its master is within 1 mile, and they can communicate with each other telepathically as long as there on the same plane of existence 

Eldritch Chomp. Melee Weapon Attack: +6 to hit, 1d6+4 Piercing Damage.

Eldritch Cuteness. Target 1 Creature within 60ft, it makes a DC 16 Intelligence Save on a fail it takes 1d10+4 Psychic Damage and have Disadvantage on its next attack.

Eldritch Jaunt: Can teleport himself and his master if they are within 5ft, up to 30ft. 

Eldritch inspiration: (2/Day) Can help a creature within 60ft with an ability Check, giving it 1d6 to add to the next ability check it makes within 1 hour.

Eldritch Twist. Can use its reaction to force a creature to reroll any d20 roll and then it picks which of those two choices are used.