Adult Velociraptor

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

Keen Hearing and Smell. The velociraptor has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Jumping Strike. If the velociraptor moves at least 10 feet straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 10 Strength saving throw or be knocked prone. If the target is a small or tiny creature it is knocked prone and is grappled (escape DC 10 Strength).

Grasping Claw. The velociraptor has advantage on all bite attacks made against creatures that it has grappled.

Disemboweling Slash. If the velociraptor hits with a claw attack against a creature that is prone, it may use a bonus action to make a second claw attack against the same target.

Combative Mount. A trained dinosaur is proficient with light, medium, and heavy armor.

Multiattack. The velociraptor makes two attacks: one with its bite and one with its claws.

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

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.