Torturous Aura

Waves of psychic energy fueled by negative emotions emanate from you in a 15-foot radius aura. For 1 minute, the aura moves with you, centered on you. At the start of their turn, each hostile creature in this aura takes 1d8 psychic damage and 1d8 necrotic damage as they are wracked with pain. Creatures who take this damage must make a Constitution saving throw against your spell save DC, on a failed save the target is consumed by pain, its speed is reduced by half, and cannot restore hitpoints until the start of their next turn.

At Higher Levels: When you cast this spell using a spell slot of 5th level or higher, the damage for both types increases by 1d8 for every two slot levels above 4th (6th level = 2d8 psychic + 2d8 necrotic).