Charge. If the oxen 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.
Sure-Footed. The oxen has advantage on Strength and Dexterity saving throws made against effects that would knock it prone.
Ram. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:8 (2d4 + 3) bludgeoning damage.
The oxen (use the giant goat statistics) of Murasa's Pillar Plains are renowned for their stubbornness, but are still used as pack animals thanks to their tremendous strength.