Hythonia

If Hythonia fails a saving throw, she can choose to succeed instead.

When a creature that can see Hythonia's eyes starts its turn within 30 feet of her, Hythonia can force it to make a DC 18 Constitution saving throw if she isn't Incapacitated and can see the creature. If the saving throw fails by 5 or more, the creature is instantly Petrified. Otherwise, on a failed save the creature begins to turn to stone and is Restrained. The Restrained creature must repeat the saving throw at the end of its next turn, becoming Petrified on a failure or ending the effect on a success. The petrification lasts until the creature is freed by the Greater Restoration spell or other magic. Unless Surprised, a creature can avert its eyes to avoid the saving throw at the start of its turn. If the creature does so, it can't see Hythonia until the start of its next turn, when it can avert its eyes again. If the creature looks at Hythonia in the meantime, it must immediately make the save. If Hythonia sees herself reflected on a polished surface within 30 feet of her and in an area of bright light, she is affected by her own gaze.

If Hythonia is reduced to 0 hit points, she doesn't die or fall Unconscious. Instead, she sheds her skin, regains 199 hit points, and moves up to her speed without provoking opportunity attacks.

Hythonia makes three attacks: one with her claws, one to constrict, and one with her snaky hair.

Melee Weapon Attack +11 to hit, reach 5 ft., one target. 9 (1d8 + 5) Slashing damage plus 4 (1d8) Poison damage.

Melee Weapon Attack +11 to hit, reach 15 ft., one Large or smaller creature. 16 (2d10 + 5) Bludgeoning damage, and the target is Grappled (escape DC 19). Until this grapple ends, the target is Restrained and takes 15 (3d6 + 5) Bludgeoning damage at the start of each of its turns, and Hythonia can't constrict another target.

Melee Weapon Attack +11 to hit, reach 10 ft., one target. 31 (4d12 + 5) Bludgeoning damage, and Hythonia can pull the target up to 5 feet closer to her if it is a Large or smaller creature.

Hythonia moves up to her speed without provoking opportunity attacks.

Hythonia makes one attack with her snaky hair.

Hythonia causes stone spikes to erupt from the ground in a 30-foot radius centered on her. The area becomes Difficult Terrain until the start of her next turn. Any creature, other than Hythonia, takes 9 (2d8) Piercing damage for every 5 feet it moves on those spikes.

Hythonia makes two attacks with her claws. If both attacks hit the same creature, it takes an extra 7 (2d6) Poison damage and must succeed on a DC 18 Constitution saving throw or become Paralyzed until the start of her next turn.

Hythonia can force a sighted creature she has Grappled to see her eyes and be affected by her gaze.