as an action, you cause the local gravity within a 30 foot diameter of you to decrease, any paper- medium weight class creatures are immediately lifted into 10 feet into the air and cannot move and must succeed on a con save with a dc of (10 + spell casting modifier) to take any actions, any heavy weight creatures must make a con save with a dc of (12 + spell casting modifier), if they succeed, they are unaffected, if they fail, they are lifted 10 feet into the air and cannot move and must succeed on a con save with a dc of (12 + spell casting modifier) to take any actions. this effect lasts as long as concentration can be held up to 3 rounds