Affliction

You cause a cloud of ash to surround one creature you can see within range. The target must succeed on a Constitution Saving Throw or take 1d8 necrotic damage and have its speed reduced to 0. On a successful save, the target takes half damage and can move freely.

At higher levels. The spell’s damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).