Living Shadow: While in dim light or darkness, the phoenix has resistance to damage that isn’t force, psychic or radiant.   Shadow Stealth: While in dim light or darkness, the phoenix can take the hide action as a bonus action.   Sunlight Sensitivity: While in sunlight, the phoenix has disadvantage on attack rolls, as well as on wisdom (perception) checks that rely on sight.   Shadowy Death & Rebirth: When the phoenix dies, it explodes. Each creature must within 60 feet of it must make a DC 20 Dex save throw, taking (4d10) necrotic damage on a failed save, or half as much on a successful one. The shadow flames ignite flammable objects in the area that aren’t worn or carried. The explosion destroys the phoenix’s body and leaves behind an egg-shaped cinder that weighs 5 pounds. The cinder is blazing hot dealing (6d6) necrotic/fire damage to any creature that touches it, though no more than once per round. The cinder is immune to all damage, and after 1d6 days, it hatches a new phoenix.   Shadow Form: The phoenix can move through a space as narrow as 1 inch wide without squeezing. Any creature that touches the phoenix or hits with a melee attack within 5 feet of it takes 1d10 necrotic/fire damage. In addition the phoenix can enter a hostile creature’s space and stop there. The first time it enters a creature’s space on a turn that creature takes 1d10 necrotic/fire damage. With a touch the phoenix can also ignite flammable objects that aren’t worn or carried (no action required)   Flyby: The phoenix sheds darkness in a 60 foot radius when it flies out of an enemy’s reach. (Creatures in range must make wisdom save DC 15 or be blinded for 1 round)   Darkness: The Phoenix spreads darkness in a 60 foot radius and dim shadows for an additional 30 feet. (Creatures in the radius are blinded unless they have magical darkvision)   Legendary Resistance: 3/day If the phoenix fails a saving throw, it can choose to succeed instead.   Siege Monster: The phoenix deals double damage to objects and structures.