Chimera X

Charge. If the Chimera X moves at least 20 ft. straight toward a target and then hits it with a ram attack on the same turn, the target takes an extra 11 (3d6) damage. If the target is a creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.

Flyby. The Chimera X doesn't provoke an opportunity attack when it flies out of an enemy's reach.

Limited Spines. The Chimera X has 15 tail spines. Used spines regrow by the time the chimera X finishes a long rest.

Magic Resistance. The Chimera X has advantage on saving throws against spells and other magical effects.

Multiattack. The chimera X makes three attacks: one with its bite, one with its ram, and one with its hooves. It can use the tail spine in place of any of the attacks.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) piercing damage. The target must succeed on a DC 15 constitution saving throw against being magically petrified On a failed save, the creature begins to turn to stone and is restrained. It must repeat the saving throw at the end of its next turn. On a success, the effect ends. On a failure, the creature is petrified for 24 hours

Ram. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: (2d8 + 4) bludgeoning damage.

Hooves. Melee Weapon Attack: +7 to hit, reach 5 ft., one prone creature. Hit: (4d8 + 4) bludgeoning damage.

Tail Spine. Ranged Weapon Attack: +7 to hit, range 20/80 ft., one target. Hit: 8 (1d12 + 2) piercing damage plus 3 (1d6) fire damage.