Charge. If the abelisaur moves at least 30 feet straight toward a creature and then hits it with a ram attack on the same turn, that target must succeed on a DC 15 Constitution saving throw or be knocked prone. If the target is prone, the abelisaur can make one swinging headbutt attack against it as a bonus action.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 12 (1d10 + 6) piercing damage.

Ram. Melee Weapon Attack: +8 to hit, reach 3 ft., one target. Hit: 8 (1d8 + 4) bludgeoning damage.

Swinging Headbutt. Melee Weapon Attack: +7 to hit, reach 4 ft, up to two targets. Hit: 12 (3d4 + 3) bludgeoning damage. Targets must succeed on a DC 13 Constitution saving throw or be knocked prone. Targets that are already prone are thrown 10 feet to the abelisaur's side, taking an additional hit of 3 bludgeoning damage from the impact.