Broadhead

Charge. If the Broadhead moves at least 10 feet straight toward a target and then hits it with a gore attack on the same turn, the target takes an extra 8 (2d8). If the target is a creature, it must succeed on a DC 15 Strength saving throw or be pushed up to 10 feet away and knocked prone.

Reckless. At the start of its turn, the Broadhead can gain advantage on all melee weapon attack rolls it makes during that turn, but attack rolls against it have advantage until the start of its next turn.

Blaze Canister. On the back of Broadheads are the volatile Blaze canisters, one on each hip. If the Broadhead is hit with an attack that deals fire damage roll a d4 to determine the effect:

• On a 1 or 2, nothing happens. The canisters are either empty of Blaze or the flames didn't reach the canister.
• On a 3,  the canisters begin to ignite, flickering with flame. If hit with another fire-based attack they will explode as if you rolled a 4, otherwise roll a d6 to determine how many rounds until the canisters explode.
• On a 4, the canisters ignite and explode. Each creature within 15 feet of the Broadhead must succeed on a DC 15 Dexterity saving throw or suffer 5d6 fire damage on a failed save, or half as much on a success. The Broadhead automatically fails this save.

Once this fireball has formed the Broadhead is now engulfed in flames for 1d4 rounds, taking 1d4 fire damage at the start of its turns for the aforementioned rounds. While on fire the Broadhead deals an additional 1d4 fire damage per attack.

Herd Beast. The Broadhead can use the Dash or Disengage action. 

Rodeo Kick. The Broadhead bucks around, lashing out against all around it with its horns and legs. It gains +1 to AC and rolls to attack any creature within 5 feet of the Broadhead(+6 to hit). On a hit, the target takes 8 (1d8 +4) bludgeoning damage and must succeed on a DC 13 Strength saving throw or be knocked prone.