Enlightened Decay

A black aura and the cloying smell of rot envelops a creature that you can see within range. The target must succeed on a Dexterity saving throw or take 1d8 Necrotic damage. On a failed save, the targeted creature is surrounded by tiny motes of corpselight: these shed dim light on a 10ft. radius centered on the target, lasting until the end of your next turn. The target cannot benefit from the Invisible condition for this duration. 

Cantrip Upgrade. The damage increases by 1d8 when you reach levels 5 (2d8), 11 (3d8), and 17 (4d8).