Chimera Nest Mother

Legendary Resistance (2/Day). If the chimera fails a saving throw, it can choose to succeed instead.

Multiattack. The chimera makes four attacks: one with its bite, one with its horns, and two with its claws. When its fire breath is available, it can use the breath in place of its bite or horns.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) piercing damage.

Horns. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) bludgeoning damage.

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 4) slashing damage.

Fire Breath (Recharge 5–6). The dragon head exhales fire in a 20-­-foot cone. Each creature in that area must make a DC 16 Dexterity saving throw, taking 36 (8d8) fire damage on a failed save, or half as much damage on a successful one.

Sentinel Bite. Creatures provoke opportunity attacks from the Chimera Nest Mother even if they take the Disengage action before leaving its reach. The chimera may make a single bite attack and, if it hits, the creature does not move and its speed drops to 0 until the start of its next turn.

The Chimera Nest Mother can take 2 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 chimera regains spent legendary actions at the start of her turn.

Tail Swipe. The Chimera swipes its tail around in an arc around it, with a radius of 10-foot. Each creature in that area must make a DC 15 Dexterity saving throw, taking 18 (5d6) bludgeoning damage on a failed save. Creatures that fail this save are knocked prone. Creatures that make a successful save take no damage. 

Dischordant Roar. A deafening roar emits from all three of the Chimera's heads, creating a dischordant, terrible noise. Enemy creatures within 30ft of the Chimera must make a DC 15 Constitution saving throw, or take 12 (3d6) psychic damage and be stunned until the end of the Chimera's next turn.