Blight Rend

You harness necrotic energy to tear at the very essence of a Blighted creature. Target one Blighted creature within range. The target must make a Constitution saving throw. On a failed save, the target takes 5d8 radiant damage and has its maximum hit points reduced by the half of this amount until it finishes a long rest. On a successful save, the target takes half damage, but its maximum hit points are not reduced.

At Higher Levels: When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 4th. You must sacrifice an additional 5 HP for each level above 4th.