Multiattack

The tricenatorus makes two attacks: one with its bite and one with its gore, or two with its tail spikes. It can't use its gore against a creature restrained by its bite.

Bite

Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 34 (4d12 + 8) piercing damage. If the target is a Medium or smaller creature, it is grappled (escape DC 18). Until this grapple ends, the target is restrained, and the tricenatorus can't bite another target.

Gore

Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 26 (4d8 + 8) piercing damage and the target must succeed on a DC 18 Strength saving throw or be knocked prone.

Tail Spike

Ranged Weapon Attack: +12 to hit, range 150/300 ft., one target. Hit: 26 (4d8 + 8) piercing damage.