Umbral Strike

You create a bolt of dark energy and launch it at a creature you can see within range. Make a ranged spell attack. On a hit, the target takes 5d10 cold damage and 5d10 necrotic damage. Additionally, the bolt’s shadow expands and covers the target, blinding it for 1 minute. The target can make a Constitution saving throw at the end of each of its turns, ending the blindness on a success.

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the damage increases by 1d10 for each slot level about 7th.