Cursed Giant Boar

Charge. If the boar moves at least 20 feet 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 14 Strength saving throw or be knocked prone.

Cursed Spores. When the boar takes damage, it releases a cloud of cursed spores. Each creature within 5 feet of the the boar must roll a d4 and subtract the number rolled from the next attack roll, ability check, or saving throw it makes before the end of the boar's next turn.

Raging Beast. On its turn, the boar always moves towards and attacks the last creature that has damaged it, even if doing so means disregarding more vulnerable targets or provoking opportunity attacks from nearby enemies. If the boar can't see such a target within 40 feet, it attacks the nearest creature instead.

Relentless (1/Day). If the boar takes 15 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.

Tusk. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) slashing damage and, if the target is a creature, it suffers a lingering wound that causes it to take 3 (1d6) necrotic damage at the start of each of its turns. Each time the boar hits the wounded target with this attack, the damage dealt by the wound increases by 3 (1d6). The wound ends if the target regains hit points or if a creature uses an action to stanch the wound, which requires a successful DC 15 Wisdom (Medicine) check.

Spew Gall (Recharge 6). The boar vomits corrupted bile in a 15-foot cone. Each creature in that area must make a DC13 Dexterity saving throw. On a failed save, a creature takes 16 (3d10) necrotic damage, and it can't regain hit points for 1 minute. On a successful save, the creature takes half as much damage with no additional effects.

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one prone creature. Hit: 7 (1d6 + 4) piercing damage and the target must succeed on a DC 13 Constitution saving throw or suffer one level of exhaustion.