Ball Lightning

You summon a Ball of Lightning anywhere you can see within 30 feet, the ball appears with a flash of light and has different colours, for example, red, dazzling white and even blue and shines like welding light, sometimes it can crack or squeak. Once summoned the Ball Lightning immediately arcs to any metal item like a weapon or armour or to any person within 10 feet of it dealing 4d6 damage, after this the ball will stay summoned for 3 turns or until you dismiss it, after the initial attack the ball will travel 10 feet in a direction dictated by the DM (use a d8 as a compass) and attack again at the start of your turn.