Mammoth

If the mammoth moves at least 20 feet straight toward a creature and then hits it with a gore attack on the same turn, that target must succeed on a saving throw or be knocked prone. If the target is prone, the Mammoth can make one stomp attack against it as a bonus action.

+10 to hit, range 10 ft. Hit: 25 (4d8 + 7) piercing damage.

+10 to hit, range 5 ft. Hit: 29 (4d10 + 7) bludgeoning damage. Melee Weapon Attack: , 5 ft., one prone creature. Hit: damage.