Allosaurus (Plate) - Summon

Opportunistic Hunter. When there is a Prone creature within 10 feet of the Allosaurus, it can make a Bite attack during its turn towards the Prone creature and deal an extra 1d6 Piercing damage.

Bite. Melee Attack Roll: +6, reach 5 ft. Hit: 16 (2d10 + 5) Piercing damage. If the target is a Medium or smaller creature and Bite successfully hits, the target has the Grappled condition and the target goes into the Allosaurus's mouth and cannot be targeted by Claws, Stomp or Tail. The target takes 2d6 Piercing damage per their turn. The target can make a DC 16 Strength or DC 16 Dexterity saving throw to escape.

Claws. Melee Attack Roll: +6, reach 5 ft. Hit: 10 (1d8 + 5) Slashing damage. 

Stomp. Melee Attack Roll: +6, reach 5 ft. Hit: 20 (6d4 + 5) Bludgeoning damage. If the target is a Medium or smaller creature and Stomp successfully hits, the target has the Prone condition.

Tail. Melee Attack Roll: +6, reach 10 ft. Hit: 18 (2d12 + 5) Bludgeoning damage. If the target is a Medium or smaller creature and Stomp successfully hits, the target has the Prone condition.