Death Armor

Level & School
2nd-level necromancy
Casting Time
Action
Range
Touch
Components
V, S, M (an onyx worth 50+ GP, which the spell consumes)
Duration
Concentration, 1 hour
Classes
Sorcerer, Wizard

For the duration, an inky aurora surrounds one creature you touch. The target has Advantage on Death Saving Throws, and once per turn, when a creature within 5 feet of the target hits it with a melee attack roll, the attacker takes 2d4 Necrotic damage.

Death Armor is a new spell for the 2024 edition