A lash of fiery energy springs from your hand toward a creature within range, forming a sustained arc of flame between you and the target. Make a ranged spell attack against that creature. On a hit, the target takes 1d12 fire damage, and on each of your turns for the duration, you can use your action to automatically deal 1d12 fire damage to the target again. The spell ends if you use your action to do anything else, if the target is ever outside the spell’s range, or if it has total cover from you.