Air Slide

You place your hand upon an object no heavier than 300lbs. A frictionless, paper thin, cushion of air forms under the object allowing it to freely move when a creature uses a an action to push or drag it. The spell ends if the object leaves your line of sight, moves farther than 20 feet from you, attempts a change in elevation of 6 inches / 15 centimeters, attempts to enter an occupied square, weighs more than 300lbs at any point, has any objects placed on top of it, it encounters difficult terrain, or an impassible barrier. 

Push, Drag, or Lift. You can push, drag, or lift a weight in pounds up to twice your carrying capacity (or 30 times your Strength score). While pushing or dragging weight in excess of your carrying capacity, your speed drops to 5 feet.