MM 80
Tyrannosaurus Rex CR: 8
Huge beast, unaligned
Armor Class: 13
Hit Points: 136hp (13d12 + 52)
Speed:
50 ft
Saving Throws: Str: +7 Dex: +0 Con: +4 Int: -4 Wis: +1 Cha: -1
Skills: Perception +4
Senses: Passive Perception 14
Challenge Rating: 8
Actions
Multiattack. The tyrannosaurus 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.
This enormous predatory dinosaur terrorizes all other creatures in its territory. Despite its size and weight, a tyrannosaurus is a swift runner. It chases anything it thinks it can eat, and there are few creatures it won't try to devour whole. While prowling for substantial prey, a tyrannosaurus subsists on carrion, and on any smaller creatures that try to dart in to steal its meal.