Spirit Shroud

Level 3 Necromancy

(Cleric, Paladin, Warlock, Wizard)
Casting Time: Bonus Action
Range: Self
Components: V, S
Duration: Concentration, up to 1 minute
You call forth intangible and invulnerable spirits of the dead, which flit around you in a 10-foot Emanation for the duration. Until the spell ends, any attack you make deals an extra 1d8 damage when you hit a creature in the Emanation. This damage is Radiant, Necrotic, or Cold (you choose when you cast the spell). Any creature that takes this damage can't regain Hit Points until the start of your next turn.
In addition, any creature of your choice that you can see in the Emanation has its Speed reduced by 10 feet until the start of your next turn.
Using a Higher-Level Spell Slot. The damage increases by 1d8 for each Spell Slot level above 3.