Big Chungus

Legendary Resistance (4/Day). If Big Chungus fails a saving throw, it can choose to succeed instead.

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

Siege Monster. Big Chungus deals double damage to objects and structures.

Edibility. Big Chungus can consume any living thing and regain 2d20 hit points. 

Bunny Hop. Big Chungus can jump up 120ft as an action, he remains in the air until his next turn and takes no fall damage. Any creature that is under him takes 12d6 bludgeoning damage.

Multiattack. Big Chungus can use its Charming Presence. It then makes four attacks, one with its bite, two with its claws, and one with its tail. It can use its Swallow instead of its bite.

Bite. Melee Weapon Attack: +17 to hit, reach 10 ft., one target. Hit: 36 (4d12 + 10) piercing damage. If the target is a creature, it is grappled (escape DC 20). Until this grapple ends, the target is restrained, and Big Chungus can't bite another target.

Claw. Melee Weapon Attack: +17 to hit, reach 15ft., one target. Hit: 28 (4d8 + 10) slashing damage.

Tail. Melee Weapon Attack: +17 to hit, reach 20ft., one target. Hit: 24 (4d6 + 10) bludgeoning damage. If the target is a creature, it must succeed on a DC 20 Strength saving throw or be knocked prone.

Charming Presence. Each creature of Big Chungus's choice within 120 feet of it and aware of it must succeed on a DC 17 Wisdom saving throw or become charmed for 1 minute. A creature can repeat the saving throw at the end of each of its turns, with disadvantage if Big Chungus is within line of sight, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to Big Chungus Charming Presence for the next 24 hours.

Swallow. Big Chungus makes one bite attack against a Large or smaller creature it is grappling. If the attack hits, the target takes the bite's damage, the target is swallowed, and the grapple ends. While swallowed, the creature is blinded and restrained, it has total cover against attacks and other effects outside Big Chungus, and it takes (10d6) acid damage at the start of each of Big Chungus's turns.

If Big Chungus takes 60 damage or more on a single turn from a creature inside it, Big Chungus must succeed on a DC 20 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of Big Chungus. If Big Chungus dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 30 feet of movement, exiting prone.

Big Chungus can take 4 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Big Chungus regains spent legendary actions at the start of its turn.

Attack. Big Chungus makes one claw attack or tail attack.

Move. Big Chungus moves up to half its speed.

Chomp (Costs 2 Actions). Big Chungus makes one bite attack or uses its Swallow.