The Fallen's Lovely Gift

The target's body is surrounded by thick ropes of darkness. For the spell's duration, the creature encased in the spell gains a bonus to death saving throws equal to your proficiency bonus, and the unconscious creature cannot be harmed until the spell is dispersed. The ropes have an AC equal to 8 + your proficiency bonus + your spellcasting modifier, have 1d12 hit points, and are immune to necrotic damage and vulnerable to radiant damage.