Big Kitty

Keen Senses. The Big Kitty has advantage on Wisdom (Perception) checks that rely on smell and hearing.

Legendary Resistance (3/Day). If the Big Kitty fails a saving throw, it can choose to succeed instead.

Enlarge/Reduce. The Big Kitty can can change its size at will, going from the size of a normal cat to the size of a tarrasque in an instant.

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

Multiattack. The Big Kitty makes five attacks: One with its bite, three with its claws, and one with its tail.

Claws. Melee Weapon Attack: +19 to hit, reach 15 ft., one target. Hit: 28 (4d8 + 10) slashing damage.

Bite. Melee Weapon Attack: +19 to hit, reach 10 ft., one target. Hit: 36 (4d12 + 10) piercing damage.

Tail. Melee Weapon Attack: +19 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.

The Big Cat 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 Big Cat regains spent legendary actions at the start of its turn.

Attack. The Big Kitty makes one claw attack or tail attack.

Move. The Big Kitty moves up to its speed.

Heal. The Big Kitty heals 1d20 hit points.