Beast of Burden. The mule is considered to be a Large animal for the purpose of determining its carrying capacity.
Sure-Footed. The mule has advantage on Strength and Dexterity saving throws made against effects that would knock it prone.
Hooves. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) bludgeoning damage.