Wolpertinger

Charge. If the wolpertinger moves at least 10 feet straight toward a target and then hits it with a gore attack on the same turn, the target takes an extra 2 (1d4) piercing damage.

Flyby. The wolpertinger doesn't provoke an opportunity attack when it flies out of an enemy's reach.

Standing Leap. The wolpertinger's long jump is up to 20 feet and its high jump is up to 10 feet, with or without a running start.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage.

Gore. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage.

Keening (Recharge 6). The wolpertinger emits a piercing shriek. Each creature within 30 feet that can hear the wolpertinger must succeed on a DC 13 Constitution saving throw or be deafened for 1 minute. A beast with an Intelligence of 4 or lower that is in the area must also succeed on a DC 13 Wisdom saving throw or be frightened until the beginning of its next turn.