Thunderstorm

You point to an area within line of sight. A large lightning storm forms above that area in a 15 foot square until the end of your next turn, and every turn, anything in the area, as well as anything that moves through the area has to make a dexterity saving throw against your spell save DC or take 3d8 lightning damage, as well as an additional 1d8 lightning damage if they are wearing metal armor. After veiwing the damage taken, anything currently not flying can attempt to run the current directly to the ground, using a d20 plus their constitution modifier against your spell save DC, removing all damage taken, however, if they fail, they must add an additional 50% damage taken. At the end of the spell, the storm dissipates in a maelstrom of electricity, forcing either a dexterity or constitution saving throw (your choice) to everyone within the area. On a failed save, they take 2d6 lightning damage and cannot react until the end of their turn, on a successful save they take half the normal damage and suffer no other penalties.

When cast using a spell slot of 6th level or higher this spell gains an additional 1d8 to the base lightning damage and and additional 1d6 to the maelstrom damage for each slot level above 5th.