Bowser, Patron of Dragon Turtles

Bowser doesn't breathe.

Multiattack. Bowser makes four attacks: one with its bite, one with it's horns and two with its claws. It can make one tail attack in place of its two claw attacks.

Bite. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 28 (3d12 + 9) piercing damage.

Horns. Melee Weapon Attack: +10 to hit, reach 5 ft., one target Hit: 20 (2d12 + 9) piercing damage

Claw. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 18 (2d8 + 9) slashing damage.

Tail. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 26 (3d12 + 7) bludgeoning damage. If the target is a creature, it must succeed on a DC 20 Strength saving throw or be pushed up to 10 feet away from the dragon turtle and knocked prone.

Fire Bolts (Recharge 4–6). Bowser casts fire bolt 3 times. Each creature in that line must make a DC 19 Dexterity saving throw, taking 52 (15d6) fire damage on a failed save, or no damage on a successful one. Being underwater doesn't grant resistance against this damage.

Shell Spin. Melee Weapon Attack: When Bowser is attacked, before damage is dealt, he may use this attack. +10 to hit, reach 5 ft, 5 ft AOE, Hit: The same amount of damage that Bowser will be dealt.