Cage of Thundering Lightning

You summon lightning and thunder, the language of the storm, which pulls a lightning bolt out of thin air that floats next to you as you select your target. 

As you direct the bolt at your target it breaks into wire like streaks of light, on impact these burry their ends into the ground completely enclosing your target. The target has to role a constitution save greater than 15, if successful the target has disadvantage on any action for 1 turn. If the constitution save is unsuccessful the target is Stunned for 1 round.

After the cage is formed thunder hits your target dealing 2D8 Lightning damage. if the target is standing in water add 1D4 lightning damage