Chimeran

Electric Aura. At the end of each of the chimeran's turns, each creature in a 5-foot Emanation originating from the chimeran takes 13 (3d8) Lightning damage.

Spell Turning. The chimeran has advantage on a saving throw against any spell that targets only the chimeran (not an area). If the chimeran's saving throw is successful and the spell is of 4th level or lower, the spell has no effect on the chimeran and instead targets the caster.

Multiattack. The chimeran makes one Gore attack, one Bite attack, one Claw attack, and one Tail attack. It can replace the Claw attack or the Gore attack with a use of Lightning Breath or Petrifying Breath if available.

Gore. Melee Attack Roll: +8, reach 5 ft. Hit: 10 (2d12 + 5) Piercing damage. If the target is a Large or smaller creature and the chimeran moved 20+ feet straight toward it immediately before the hit, the target has the Prone condition.

Bite. Melee Attack Roll: +7, reach 5 ft. Hit: 11 (2d6 + 4) Piercing damage, or 18 (4d6 + 4) Piercing damage if the chimeran had Advantage on the attack roll.

Claw. Melee Attack Roll: +7, reach 5 ft. Hit: 7 (2d8 + 4) Slashing damage.

Tail. Melee Attack Roll: +7, reach 10 ft. Hit: 7 (2d6 + 4) Bludgeoning damage.

Lightning Breath (Recharge 5–6). Dexterity Saving Throw: DC 15, each creature in a 30-foot Cone. Failure: 32 (5d12) Lightning damage. Success: Half damage.

Petrifying Breath (Recharge 5–6). Constitution Saving Throw: DC 15, each creature in a 30-foot Cone. First Failure: The target has the Restrained condition and repeats the save at the end of its next turn if it is still Restrained, ending the effect on itself on a success. Second Failure: The target has the Petrified condition instead of the Restrained condition.

Trample. Dexterity Saving Throw: DC 16, one creature within 5 feet that has the Prone condition. Failure: 16 (2d10 + 5) Bludgeoning damage. Success: Half damage.