These Wings When Attuned to Attach to your Back, These Wings take on the Form of Rotting Ravens Wings.

While Attuned to the Wings you have a Flying Speed of 120 Feet, Resistance to Necrotic and Radiant Damage.

While Attuned to these Wings you can Expend your Action to use a "Rotting Wings" Ability:

Rotting Wings: as an Action you can Spin and any Hostile Creature within 120 Feet of you takes 4d10 Necrotic Damage, If you are Flying while you take this Action you Instead Deal 5d10 and Summon 2d4 Undead Ravens and Vultures

Notes: Resistance: Necrotic, Resistance: Radiant, Bonus: Speed (Flying)