Cripple

You take 3d6 necrotic damage that can not be reduced in any way. Then you may target one creature within 30 ft. that you can see. They must make a Constitution saving throw or have their base walking and swimming speeds reduced by half and all other forms of movement reduced to 0. In addition, they have disadvantage on all Strength, Dexterity, and Constitution saving throws and abilities. You can remove these effects with a bonus action or when the creature makes a long rest.

At higher levels. You may take an additional 1d6 necrotic damage and cast this spell on an additional creature for each level above 3rd.