Baby Tarrasque

Legendary Resistance (1/Day). If the baby tarrasque fails a saving throw, it can choose to reroll until it succeeds

Magic Resistance. The baby tarrasque has advantage on saving throws against spells and other magical effects.

Reflective Carapace. Any time the baby tarrasque is targeted by a magic missile spell, a line spell, or a spell that requires a ranged attack roll, roll a d6. On a 1 to 5, nothing happens and it takes damage as usual. On a 6, the tarrasque is unaffected, and the effect is reflected back at the caster as though it originated from the tarrasque, turning the caster into the target.

Siege Monster. The baby tarrasque deals triple damage to objects and structures (and people when they try to make it eat it's food).

Multi-attack. It then makes 3 attacks: one with its bite, one with its claws, and one with its horns. It can use its Swallow instead of its bite.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (2d6) piercing damage. If the target is a creature, it is grappled (escape DC 10). Until this grapple ends, the target is restrained, and the baby tarrasque can't bite another target.

Claw. Melee Weapon Attack: +7 to hit, reach 5ft., one target. Hit: 10 (1d8 + 4) slashing damage.

Horns. Melee Weapon Attack: +7 to hit, reach 5ft., one target. Hit: 32 (2d5 + 2) piercing damage.

Tail. Melee Weapon Attack: +7 to hit, reach 5ft., one target. Hit: 24 (2d6 + 2) bludgeoning damage. If the target is a creature, it must succeed on a DC 5 Strength saving throw or be knocked prone.

Swallow. The baby tarrasque makes one bite attack against a tiny 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 the tarrasque, and it takes 20(5d6) acid damage at the start of each of the baby tarrasque's turns.

If the baby tarrasque takes 5 damage or more on a single turn from a creature inside it, the baby tarrasque must succeed on a DC 15 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 5 feet of the baby tarrasque. If the baby tarrasque dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 5 feet of movement, exiting prone.

The baby tarrasque can take 3 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. The baby tarrasque regains spent legendary actions at the start of its turn.

Attack. The baby tarrasque makes one claw attack or tail attack.

Move. The baby tarrasque moves up to half its speed.

Chomp (Costs 2 Actions). The baby tarrasque makes one bite attack or uses its Swallow.