Enchanted Attacks. The Brass Bull's melee attacks are treated as magical.

Magic Resistance. The Brass Bull has advantage on saves against spells and other magical effects.

Trampling Charge. If the Brass Bull moves at least 20 feet straight toward a creature and then hits it with a gore attack on the same turn, that target must succeed on a DC 16 Strength saving throw or be knocked prone. If the target is prone, the Brass Bull can make one attack with its hooves against it as a bonus action.

Multiattack. The Brass Bull makes two hoof strike attacks, or one gore attack and one hoof strike attack.

Gore. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 18 (2d12 + 5) piercing damage. If the Brass Bull has moved 20 feet in a straight line toward a target before hitting, the target must succeed on a DC 16 Strength save or be knocked prone and the Brass Bull may make a hoof strike attack against it as a bonus action.

Hoof Strike. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 11 (1d10 + 5) bludgeoning damage. A target struck by two hoof strikes in the same turn must succeed on a DC 16 Constitution save or be stunned until the end of their next turn.

Poison Breath (Recharge 6). The Brass Bull exhales poisonous gas in a 15-foot cone. Each creature in that area must make a DC 16 Constitution saving throw, taking 21 (6d6) poison damage on a failed save, or half as much damage on a successful one.