Blood Frenzy. The young tyranngolodon has advantage on melee attack rolls against any creature that doesn't have all its hit points.

Feeding Frenzy. The young tyranngolodon has advantage on attack rolls against a creature if at least one of the young tyranngolodon's allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack. The young tyranngolodon makes two attacks: one with its bite and one with its tail. It can't make both attacks against the same target.

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 33 (4d12 + 7) piercing damage. If the target is a Small or smaller creature, it is grappled (escape DC 17). Until this grapple ends, the target is restrained, and the young tyranngolodon can't bite another target.

Tail. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 20 (3d8 + 7) bludgeoning damage.

Swallow. The young tyranngolodon makes one bite attack against a Small or smaller target it is grappling. If the attack hits, the target is also swallowed, and the grapple ends. While swallowed, the target is blinded and restrained, it has total cover against attacks and other effects outside the young tyranngolodon, and it takes 21 (6d6) acid damage at the start of each of the young tyranngolodon's turns. A young tyranngolodon can have only one creature swallowed at a time.

If the young tyranngolodon takes 30 damage or more on a single turn from the swallowed creature, the young tyranngolodon must succeed on a DC 14 Constitution saving throw at the end of that turn or regurgitate the creature, which falls prone in a space within 10 feet of the young tyranngolodon. If the young tyranngolodon dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 15 feet of movement, exiting prone.