Witch Bolt

Duration: 1 minute, Concentration
Make a ranged spell attack. The target takes 1d12
lightning damage. You can use your action on
subsequent turns to deal 1d12 lightning damage
to the same target automatically. The spell ends
if you use your action to do anything else, if the
target leaves the spell's range or has total cover.
At Higher Levels. The damage increases by
1d12 for each extra spell slot.