ChemGatherer (Bellowback)

Trampling Charge. If the ChemGatherer moves at least 20 feet straight toward a creature and then hits it with a slam attack on the same turn, that target must succeed on a DC 13 Strength saving throw or be knocked prone. If the target is prone, the triceratops can make one stomp attack against it as a bonus action.

Unnatural Nature. The DuoHorn doesn't breathe, eat or sleep. 

Stored Chemicals. At the start of the day, the ChemGatherer chooses to one of following: fire, cold, acid or poison. The ChemGatherer can only use the Breath action of that type for that day. 

Slam. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 24 (6d6 + 5) piercing damage.

Cold Breath (Recharge 3–6). The ChemGatherer exhales an icy blast in a 60-foot cone. Each creature in that area must make a DC 16 Constitution saving throw, taking (8d8) cold damage on a failed save, or half as much damage on a successful one.

Fire Breath (Recharge 3–6). The ChemGatherer exhales a fiery blast in a 60-foot cone. Each creature in that area must make a DC 16 Constitution saving throw, taking (8d8) fire damage on a failed save, or half as much damage on a successful one.

Acid Breath (Recharge 3–6). The ChemGatherer exhales a corrosive blast in a 60-foot cone. Each creature in that area must make a DC 16 Constitution saving throw, taking (8d8) acid damage on a failed save, or half as much damage on a successful one.

Poison Breath (Recharge 3–6). The ChemGatherer exhales a toxic blast in a 60-foot cone. Each creature in that area must make a DC 16 Constitution saving throw, taking (8d8) poison damage on a failed save, or half as much damage on a successful one.