Charge: If the boar moves at least 20 ft straight toward a target and then hits it with a tusk attack on the same turn, the target takes an extra 7 (2d6) slashing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone
Relentless (Recharges after a Short or Long Rest): If the boar takes 10 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead
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ACTIONS
Tusk: Melee Weapon Attack: +5 to hit, reach 5 ft, one target. Hit: 10 (2d6 + 3) slashing damage