Electrify Water

You pass electrical currents through a body of water or water-like liquid, potentially harming creatures that are within it. Choose a point in a body of liquid that you can see within range. Each creature touching the same body of liquid as the point must make a Constitution saving throw if they within 20-feet of the point. A creature that has a swimming speed makes this save with advantage. On a failed save, a creature takes 4d6 lightning damage and is paralyzed until the beginning of your next turn, or half as much damage and isn't paralyzed on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.