Great Weapon Fighting. When Zo’rhias roll a 1 or 2 on a damage die for an attack with a melee weapon he is wielding with two hands, Zo’rhias can reroll the die and must use the new roll, even if the new roll is a 1 or a 2.

Second Wind. On your turn, you can use a bonus action to regain hit points equal to 1d10 + 12.

Keen Hearing and Smell. Zo’rhias has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Special Equipment. Zo'rhias wears the Gauntlets of Flaming Fury, which you can check in the Descent into Avernus book. He also uses the Predator's Blade, a huge dark greatsword with fire in the edge (you can check it in the Magic Items Homebrew section of this site).

Legendary Resistance (3/Day). If Zo’rhias fails a saving throw, it can choose to succeed instead.

Multiattack. Zo’rhias makes two attacks: two with its greatsword or one with its bite and one with its greastsword.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 5) piercing damage plus 5 (1d8) fire damage.

Predator's Blade. Melee Weapon Attack: +9 to hit, reach 5 ft., one creature. Hit: 14 (2d6 + 6) slashing damage plus 3 (1d4) fire damage, and plus 4 (1d6) fire damage from the Gauntlets of Flaming Fury, if he activated them.

Fire Breath (Recharge 5–6). Zo’rhias exhales fire in a 30-foot cone. Each creature in that area must make a DC 15 Dexterity saving throw, taking 32 (8d6) fire damage on a failed save, or half as much damage on a successful one.

Zo’rhias can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The werechimera regains spent legendary actions at the start of its turn.

Detect. Zo’rhias makes a Wisdom (Perception) check.

Greatsword Attack. Zo’rhias makes a greatsword attack.

Hot Breath. Zo’rhias can make a Firebolt spell attack.

Wing Attack (Costs 2 Actions). Zo’rhias beats its wings. Each creature within 10 feet of Zo’rhias must succeed on a DC 15 Dexterity saving throw or take 17 (2d6 + 9) bludgeoning damage and be knocked prone. Zo’rhias can then fly up to half its flying speed.