Giant Goat

The giant goat has advantage on Strength and Dexterity saving throws made against effects that would knock it prone.

If the giant goat moves at least 20 feet straight toward a target and then hits it with a ram attack on the same turn, the target takes an extra 5 (2d4) bludgeoning damage.
If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone.

Melee Weapon Attack: +5 to hit, reach 5 ft.. Hit: 8 (2d4 + 3) bludgeoning damage.