Giganotosaurus (5e Creature)
From D&D Wiki
Gargantuan beast (theropod), unaligned
Multiattack. The giganotosaurus 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: +14 to hit, reach 10 ft., one target. Hit: 36 (4d12 + 10) piercing damage. If the target is a Large or smaller creature, it is grappled (escape DC 20). Until this grapple ends, the target is restrained, and the giganotosaurus can't bite another target.
Tail. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 23 (3d8 + 10) bludgeoning damage.
Swallow. The giganotosaurus makes one bite attack against a Medium 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 giganotosaurus, and it takes 21 (6d6) acid damage at the start of each of the giganotosaurus's turns. The giganotosaurus can have only one creature swallowed at a time.
Using what some experts term the Slow Burn Method, these normally solitary predators gather in groups of 2-4 individuals, and use their long jaws to slash the prey and cause massive amounts of bleeding and drain the prey of stamina until it collapses, then they move in and finish the kill. After a successful hunt, the gigas go into a feeding frenzy, snapping and roaring at each other until each one eats their fill. Despite this, gigas won't hesitate to go after easier prey, such as humanoids.