Trampling Charge. If the ceratops 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 13 Strength saving throw or be knocked prone. If the target is prone, the ceratops can make one stomp attack against it as a bonus action.
Gore. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit:24 (4d8 + 6) piercing damage.
Stomp. Melee Weapon Attack: +9 to hit, reach 5 ft., one prone creature. Hit:22 (3d10 + 6) bludgeoning damage.
Dinosaurs are the dominant form of animal life in Ixalan—the absolute rulers of the coastal lands held by the Sun Empire, and a force to be reckoned with in the interior jungles. A number of dinosaurs appear in the Monster Manual, with even more to be found in Volo's Guide to Monsters, making that a particularly worthwhile resource for an Ixalan campaign. (Many of the dinosaurs in Volo's Guide also appear in Tomb of Annihilation.)