Dies Irae

You point at one creature you can see within range and the light bouncing off the creature begins to shudder and blur. The target must succeed on a Wisdom saving throw or take 1d8 necrotic damage and be aged by 1 day. If the target is missing any of its hit points, it instead takes 1d12 necrotic damage as its wounds fester.

At Higher Levels. The spell’s damage increases by one die and the target ages by an additional 12 hours when you reach 5th level (2d8 or 2d12, 1.5 days), 11th level (3d8 or 3d12, 2 days), and 17th level (4d8 or 4d12, 2.5 days).