Pack Tactics. The albertosaurus has advantage on an attack roll against a creature if at least one of the albertasaurus's allies is within 5 feet of the creature and the ally isn't incapacitated.

Infected. The albertosaurus can infect a dinosaurs with the plaque and turn that dinosaur into a zombie

Multiattack. The Albertosaurus 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 Medium or smaller creature, it is grappled (escape DC 17). Until this grapple ends, the target is restrained, and the tyrannosaurus can't bite another target.

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

Undead Nature. A Albertosaurus zombie doesn't require air, food, drink, or sleep.