Overheat. As a bonus action, the pyroceratus can gain one d6 overheat die. The next time it uses its fire breath, it adds all accumulated overheat dice to the attack's damage, and it loses all its dice. At the start of the pyroceratus's turn, if it has accumulated at least 8 dice (or 4 if it is below half its maximum hit points), it takes 1d4 bludgeoning damage, and its movement speed is halved. The pyroceratus loses its overheat dice if it is incapacitated.   Trampling Charge. If the pyroceratus 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 14 Strength saving throw or be knocked prone. If the target is prone, the pyroceratus can make an attack with its spur against it as a bonus action.