Chocobo Eater

Silent Hunter. Despite it's massive size, the chocobo eater moves in absolute silence, allowing it to hide in plain sight.

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

Magical Resistance. the Chocobo Eater has advantage on saving throws against spells

Claw slash. Melee Weapon Attack: +15 to hit, reach 15 ft., 1 target. Hit: +15 (1d12 + 15) [Slashing] damage. 

Clothesline Sweep. The chocobo eater lunges forward 15 feet. All creatures within a 35 foot line in front of the chocobo eater must make Strength saving throw (DC 25) on a failed save the creature takes 5d12 Bludgeoning damage and is pushed back 20 ft. As well as knocked prone. On a successful save they take half damage and are not knocked prone or pushed back.

Chocobo Toss. RangedWeapon Attack: +10 to hit, range30/60 ft., 1 target. Hit: +10 (2d12 +10) [Piercing] damage.

The Chocobo eater has 1 bonus action each turn that it can use to make an additional strike

You're Next. When chosen as the target of a weapon attack or a spell the Chocobo eater can choose to use its reaction to grant advantage on all strikes as well as an additional strike in retaliation on its next turn.

The Chocobo Eater has three legendary actions each round, and can use one legendary action at the end of another creatures turn. Legendary actions refresh at the start of the chocobo eater's turn and cannot be replenished through other means

Claw Stike (Costs 1 Actions). The Chocobo Eater can use a legendary action to make a claw strike against another creature.