Thomas A Swifts Electrical Rigor

A blast of electrical energy destabilises the targets physical form. It has no effect on incorporeal or ethereal creatures.

The target takes 2d8 lightning damage, has disadvantage on all Strength and Dexterity rolls and has it's movement halved. Until the start of your next turn. On a successful CON save the target just takes half damage .

If this spell is cast at the 2nd level or higher a failed save also makes the target prone.