Soul burn. Creatures that move within 5-feet of the Wraithfire dragon or start their turn within this area must succeed on a DC 15 Constitution saving throw taking 5 (1d8) necrotic damage plus 5 (1d8) fire damage. The Wraithfire dragon heals equal to the damage dealt this way. 

Firey form. The Wraithfire dragon can move through a space as narrow as 1 inch wide without squeezing. In addition, the Wraithfire dragon can enter a hostile creature's space and stop there. Creatures occupying the same space as the Wraithfire dragon take an additional 4 (1d8) necrotic damage per turn from its Soul burn ability.

Illumination. The Wraithfire dragon sheds bright light in a 40-foot radius and dim light in an additional 40 feet.

Multiattack. The Wraithfire dragon makes two attacks: one with it's Claws and one with it's Bite.

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) necrotic damage plus 3 (1d6) fire damage. The Wraithfire Dragon heals equal to the damage done this way.

Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) fire damage. The Wraithfire Dragon heals equal to the damage done this way.

Necrotic Blaze (Recharge 5–6). The Wraithfire dragon exhales fire in a 30-foot cone. Each creature in that area must make a DC 17 Constitution saving throw, taking 42 (12d6) necrotic damage on a failed save, or half as much damage on a successful one. The Wraithfire Dragon heals equal to the damage done this way.

 Wraithlight. The Wraithfire dragon resurrects all corpses within a 40-foot radius to life as Flame zombies under its control. For every corpse resurrected this way the Wraithfire dragon loses 10 hit points. All flame zombies within a 10-foot radius of the Dragon deal an additional 5 (1d8) fire damage with their melee attacks.