Bull of Heaven

Trampling Charge. If the Bull of Heaven 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 18 Strength saving throw or be knocked prone. If the target is prone, the gorgon can make one attack with its hooves against it as a bonus action.

Spellcasting. The Bull of Heaven is an innate spellcaster that can innately cast the following spells:

At will: Earth Tremor

1/day: Earthquake

Gore. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: (3d12 + 5) piercing damage.

Hooves. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: (3d10 + 5) bludgeoning damage.

Petrifying Breath (Recharge 5–6). The Bull of Heaven exhales petrifying gas in a 30-foot cone. Each creature in that area must succeed on a DC 15 Constitution saving throw. On a failed save, a target begins to turn to stone and is restrained. The restrained target must repeat the saving throw at the end of its next turn. On a success, the effect ends on the target. On a failure, the target is petrified until freed by the greater restoration spell or other magic.

Reactive Plating. When an enemy hits the Bull of Heaven with a melee attack, the Bull of Heaven can use its reaction to cause its armor plating to hit back, dealing half of the attack damage back at the attacker.

Overcharge. The Bull of Heaven charges its full movement speed, making a gore attack against each enemy in its way.

Divine Judgement. The Bull of Heaven stomps the ground with extreme force, causing the ground around it to shake. Everyone within a 15 ft radius of the Bull of Heaven must make a DC 15 Dexterity saving throw or take 3d8 bludgeoning damage and be knocked prone, and the area becomes difficult terrain.