Black Brute Drake

Standing Leap. The Drake's long jump is up to 40 feet and its high jump is up to 25 feet, with or without a running start.

Unimpleadable. The Drake cannot be slowed down by any physical object smaller then it and is unable to be slowed down by rough terrain. 

Leap Attack. The Drake makes a long or high jump toward a target and then hits it with a stomp attack on the same turn, the target takes an extra 22 (5d8) bludgeoning damage.

Tremors. When the Drakes makes a stomp attack, every creature besides the target of the attack within 15 ft of the attack must succeed on a DC 22 Dexterity saving throw or be knocked prone and 9 (2d8) bludgeoning damage. On a successful save the creature takes no damage and is not knocked prone.

Keen Smell. The Drake has advantage on Wisdom (Perception) checks that rely on smell.

Siege Monster. The Brute Drake deals double damage to objects and structures.

Multiattack. The Brute Drake makes three attacks: two with its Stomp and one with its Bite or Tail Blade.

Bite. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 35 (4d12 + 9) piercing damage. 

Stomp. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 22 (3d8 + 9) bludgeoning damage.

Tail Blade. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 25 (3d10 + 9) slashing damage. If the target is a creature, it must succeed on a DC 22 Strength saving throw or be knocked prone.