Broadway

Innate Spellcasting. Broadway innate spellcasting ability is Charisma. Broadway can innately cast the following spells, requiring no material components:

At will: darkness, detect magic, dispel magic, invisibility (self only), mirror image

Magic Resistance. Broadway has advantage on saving throws against spells and other magical effects.

Magic Weapons. Browadway weapon attacks are magical.

Vulnerability: When in stone form vulnerable to bludgeoning damage.

Multiattack. Boradway makes three melee attacks, 

Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., one target.  (5d6 + 5) slashing damage. If the target is a creature, it must succeed on a DC 16 Constitution saving throw or take 10 (2d4) bludgeoning damage at the start of each of its turns due to a fiendish wound. Each time Broadway hits the wounded target with this attack, the damage dealt by the wound increases by 10(4d4). Any creature can take an action to stanch the wound with a successful DC 13 Wisdom (Medicine) check. The wound also closes if the target receives magical healing.

Frenzy: As a bonus action Broadway can get an extra attack with the berserker feature

Rage: Broadway can rage five times per long rest. He has resistance to all damage type except psychic while raging.

Opportunity Attack: If a creature is within malee range and attempts to move away Broadway can attempt to attack the creature.

3 in total:

Claw attack: Uses Multiattack once per round

Pudgy Attack: Once per round within melee range can attack with belly. Character must make a Strength save 18 or fall prone. +8 hit damage 3d10 bludgeoning damage.

Heal: If successful with Belly attack he can heal up half the damage he deals.