Chimeralisk

A large monstrosity with the armored body of a gorgon with two other heads attached. One large cockatrice head, a large basilisk head and a gorgon head sprout from the shoulders. It has 3 different ways it can turn you to stone so it may consume your faux-stone carcass.  The gaze of any of the heads of the Chimeralisk can petrify as a basilisk, on a dc of 13, the breath weapon of the Chimeralisk's lizard head can cause petrification on a dc of 14 and the physical attacks cause petrification like a cockatrice at DC 11.

Multiattack. The chimera makes three attacks: Two with its bite, and one with its claws. When its petrifying breath is available, it can use the breath in place of a bite attack.  Each head can also lock gaze with whoever it is fighting so that it might turn them to stone as a basilisk does.

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

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage plus 7 (2d6) poison damage.

Petrifying Breath (Recharge 5–6). The lizard head exhales gas in a 15-­-foot cone. Each creature in that area must make a DC 14 Constitution saving throw, becoming restrained and having to make another saving throw at the end of its next turn on a failed save, to avoid becoming petrified if both are failed.