Aeloria

You summon a swirling mass of tormented souls in a 10-foot radius, turning the area into difficult terrain. Creatures entering or starting their turn inside take 3d8 necrotic damage (Constitution save for half) and have their speed halved until their next turn. Undead you control in the area gain temporary HP equal to half the damage dealt. If a creature dies inside, you can use your reaction to deal 2d8 necrotic damage to another target within 10 feet. Damage increases by 1d8 per slot level above 5th.