Barry

Magic Resistance. Has advantage on saving throws for spells or other magical effects.

Song of Rest. Anyone who can hear the song while taking a short rest heals an extra 2d6 health.

Spellcasting. His spellcasting ability is Charisma (spell save DC 15, +6 to hit with spell attacks). He has the following spells prepared:
At will: detect thoughts, levitate, friends, mage hand, vicious mockery
3/day: healing word
1/day: shatter

Tentacles. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (2d10 + 4) psychic damage. On a hit the target is grappled (escape DC 15), the grappled target must succeed a DC15 Intelligence saving throw or be stunned until the grapple ends.

Extract Brain. Melee Weapon Attack: +7 to hit, reach 5 ft., one grappled target target. Hit: 55 (10d10) piercing damage. If the damage reduces the target to 0 hit points, Barry kills the target by extracting and devouring its brain.

Mind Blast (Recharge 5-6). Psychic energy emits in a 60-foot cone. Each creature in the area must succed a DC15 Intelligence saving throw or take 22 (4d8 +4) psychic damage and be stunned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on a success.