Witch Bolt (custom)

A beam of crackling blue energy lances out toward a vreature within range, forming a sustained arc of ligjtning between you and your target. Make a ranged spell attack agaimst that creature. On a hit, the tarhet takes 1d12 lightning damage and on each of your turns for the duration, you can use your action to deal 1d12 lightning damage automatically. The spell ends if you use your action to do anything else or the target gets out of range or it has total cover from you.