Colchis Bull

Heart of the Bull. The colchis bull has a breath attack based on the type of magic source used to power it's metal chassis (choose or roll a d6): 1–2, acid (bronze); 3–4, fire (Iron); 5–6, lightning (gold).

Trampling Charge. If the colchis 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 colchis bull can make one attack with its hooves against it as a bonus action.

Gore. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 18 (2d12 + 5) piercing damage.

Hooves. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 16 (2d10 + 5) bludgeoning damage.

Furnace Breath (Recharge 5–6). The colchis bull exhales fire in a 15-foot cone. Each creature in that area must make a DC 15 Dexterity saving throw, taking 38 (7d10) damage of the type determined by Heart of the Bull on a failed save, or half as much damage on a successful one.