Bulette

The bulette's long jump is up to 30 feet and its high jump is up to 15 feet, with or without a running start.

Melee Weapon Attack +7 to hit, reach 5 ft., one target. 30 (4d12 + 4) Piercing damage.

If the bulette jumps at least 15 feet as part of its movement, it can then use this action to land on its feet in a space that contains one or more other creatures. Each of those creatures must succeed on a DC 16 Strength or Dexterity saving throw (target's choice) or be knocked Prone and take 14 (3d6 + 4) Bludgeoning damage plus 14 (3d6 + 4) Slashing damage. On a successful save, the creature takes only half the damage, isn't knocked Prone, and is pushed 5 feet out of the bulette's space into an unoccupied space of the creature's choice. If no unoccupied space is within range, the creature instead falls Prone in the bulette's space.