as an action, you redirect the direction of gravity of all creatures within 40 feet that you can see if they fail a con save with a dc of (12+spell casting modifier), causing them to begin to fall in that direction. (ie. up, down, left and right) gravity for this creature returns to normal if they are to go further than 80 feet from you. this effect lasts until concentration is broken up to 6 rounds.
reminder: a creature normally takes 1d6 bludgeoning damage per 10 feet fallen up to 20d6