Aytyzoiviodel Gnawbone's children

Legendary Resistance (3/Day). If Aytyzoiviodel fails a saving throw, they can choose to succeed instead.

Multiple Heads. Aytyzoiviodel can take one reaction per turn, rather than only one per round. They also has advantage on saving throws against being knocked unconscious. If they fail a saving throw against an effect that would stun a creature, one of their unspent legendary actions is spent.

Living Shadow. While in dim light or darkness, the dragon has resistance to damage that isn’t force, psychic, or radiant.

Shadow Stealth. While in dim light or darkness, the dragon can take the Hide action as a bonus action.

Sunlight Sensitivity. While in sunlight, the dragon has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Multiattack. Aytyzoiviodel makes three attacks: two with their claws and one with their bite.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 7 (2d6) poison damage.

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

3 reactions/ 1 per head

Aytyzoiviodel 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. Aytyzoiviodel regains spent legendary actions at the start of their turn.

Aytyzoiviodel’s legendary action options are associated with their three dragon heads (a bite and a breath weapon for each). Once they choose a legendary action option for one of their heads, Aytyzoiviodel can’t choose another one associated with that head until they use another head as a legendary action.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) slashing damage plus 7 (2d6) psychic damage ( Aytyrainth), necrotic damage (Zoiviodios), poison damage (Yzodel).

Yzodel: Green Dragon Head: Poison Breath (Costs 2 Actions). Aytyzoiviodel breathes poisonous gas in a 30foot cone. Each creature in that area must make a DC 17 Constitution saving throw, taking 36 (12d6) poison damage on a failed save, or half as much damage on a successful one.

Zoiviodios: Shadow Green Dragon Head: Necrotic Breath (Costs 2 Actions). Aytyzoiviodel exhales shadowy gas in a 30-foot cone. Each creature in that area must make a DC 17 Consitution saving throw, taking 36 (12d6) necrotic damage on a failed save, or half as much damage on a successful one. A humanoid reduced to 0 hit points by this damage dies, and an undead shadow rises from its corpse and acts immediately after the dragon in the initiative count. The shadow is under the dragon’s control.

Aytyrainth: Undead Green Shadow Head: Psychic Horror Breath  (Costs 2 Actions). Aytyzoiviodel breathes a 30ft cone of blackish purple gas. Each creature in that line must make a DC 17 Wisdom saving throw, taking 36 (12d6) psychic damage on a failed save, or half as much damage on a successful one. If the creature fails it save by 5 or more, they take on the despair of the shadowfell (roll on the despair table) if already in despair they take on short-term madness, if already mad they take on long-term madness and then finally indefinite madness