Rhinoceros

Gore. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (2d8+5) bludgeoning damage. If the rhinoceros moves at least 20 feet straight towards the target before the attack the attack deals an extra 4 (1d8) bludgeoning damage and the target makes a DC 15 Strength saving throw falling prone on a failure.