Blessing from Beyond

Dark energy radiates from you in an aura with a 30-foot radius, empowering friendly creatures with shadowy magic. Until the spell ends, the aura moves with you, centered on you. While in the aura, each nonhostile creature in the aura (including you) deals an extra 1d4 necrotic damage when it hits with a weapon attack.

At Higher Levels. When you cast this using a spell slot of 4th level or higher, the extra damage increases by 1d4 for each slot level above 3rd.