Allosaurus

Melee Weapon Attack: +6 to hit, reach 5 ft.. Hit: 15 (2d10 + 4) piercing damage.

Melee Weapon Attack: +6 to hit, reach 5 ft.. Hit: 8 (1d8 + 4) slashing damage. If the target is a Large or smaller creature and the allosaurus moved 30+ feet straight toward it immediately before the hit, the target has the Prone condition, and the allosaurus can make one Bite attack against it.