Corvus' Crimson Whip

You create a crimson lash of pure lightning energy, at will, you can use it as following:

• Strike one creature of your choice within range. Make a melee spell attack against the target. If the attack hits, the creature takes 1d8 of lightning damage.
• Choose one willing or unwilling creature of your choice within range to be wrapped around by the lash. If the target is unwilling, it must succeed on a Strength saving throw or be pulled up to 10 feet in a straight line towards you. You can choose to energize the lash, causing the target to take 1d8 of lightning damage if it is whithin 5 feet of you.
• If you target one object whithin range that weights up to 15 pounds, the lash can pull the object towards you whithin your reach.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 10th level (3d8), 15th level (4d8) and 20th level (5d8).