Black Waters

A powerful Black Water current spues out at a point you can see within 150 feet of you, surging out and then sucking everyone back to the centre point. Each creature within a 20-foot-radius sphere centered on that point must make a Strength saving throw. A creature takes 6d6 force damage and is pulled to the center point on a failed save, or half as much damage and is not pulled into the center on a successful one.

At Higher Levels.  When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.