Charge. If the beast moves at least 20 feet straight toward a target and then hits it with a tusk attack on the same turn, the target takes an extra 3 (1d6) slashing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone.

Relentless (Recharges after a Short or Long Rest). If the beast takes 10 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.

Multiattack. The chimera makes three attacks: one with its beak, one with its tusks, and one with its claws. When its fire breath is available, it can use the breath in place of its beak/bite or tusks.

Beak/bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (2d6 + 2) piercing damage.

Tusk. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (2d6 + 2) slashing damage.

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

Acid Breath (Recharge 6). The dragon head exhales acid in a 15-­foot line that is 5 feet wide. Each creature in that line must make a DC 12 Dexterity saving throw, taking 21 (6d6) acid damage on a failed save, or half as much damage on a successful one.