Charge. If the young bison moves at least 25 feet straight toward a target and then hits it with a head butt attack on the same turn, the target takes an extra 3 (1d6) bludgeoning damage. If the target is a creature, it must succeed on a DC 11 Strength saving throw or be knocked prone.

Relentless (Recharges after a Short or Long Rest). If the young bison takes 7 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.

Head Butt. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage.

Beast of Burden. The young bison is considered to be a Large animal for the purpose of determining its carrying capacity.

Firm-Footed. The young bison has advantage on Strength saving throws made against effects that would knock it prone.