Carnotaurus

Camouflage scales: The scales of this creature give it the ability to fully camouflage itself at night.

Rush down: If the Carnotaurus uses at least 20 ft of movement before using a bite attack the target takes an additional 2d6 slashing damage

 Charge: If the Carnotaurus uses at least 20 ft of movement before using its horns attack the target must make a DC 14 strength save or be knocked prone

Multiattack. The Carnotaurus makes two attacks: one with its bite or horns and one with its tail. It can't make both attacks against the same target.

Bite. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 33 (3d12 + 6) piercing damage.

Tail. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 20 (2d8 + 6) bludgeoning damage.

Horns. Melee Weapon Attack: +9 to hit. reach 5ft. One target. 2d8 + 6

Camouflage scales: The Carnotaurus can use its scales to conceal itself amongst the terrain only at night. Negated only by bright light.