Bigga's Ball of Lightning

After the contents are places inside the metal orb you start to pour some magic into the orb and lightning is channeled around the orb. Then you launch the round shaped lightning ball to the target and as it hits the target area there is a brief second of silence in the area then a large static reverberation . Everything in the area take 8d6 lightning damage and must make a dexterity save against your spell dc. On a failed save targets take full damage and are paralyzed or stunned (dm's discretion) for 1 round. On a save targets take half damage and aren't paralyzed or stunned (dm's discretion). If targets are wielding any metal weapons or wearing armor containing metal they have drop their weapon immediately and cannot be picked up for 1d4 rounds as the weapon contains an electrical current.

At Higher Levels;  When you cast this spell using a spell slot of 6th level or higher (unless a half caster has the spell), the damage increases by 1d6 for each slot level above 5th.