Electrocute

You evoke an electric shockwave to electrocute creatures that are in contact with you. You deal 1d8 lightning damage to a creature of your choice. This creature has to be in physical contact to you or be connected to you by any conductive object or surface and be within 60 feet of you.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8). For each die of damage you can select a different creature as a target. For example if 4 separate creatures are standing within 60 feet in the same body of water as you, you can either deal 1d8 lightning damage to each of them, or 4d8 lightning damage to a single chosen creature.