Compact

You touch a creature or an object which quivers slightly, before jerking inwards, dividing the target's size by 5 (rounded down), and compacts the object into a square, crushing any resisting forces preventing the target from being pressed into the target size, if the selected target is a creature, it makes a DC 15 strength saving throw to resist being affected, and upon failure it takes 3d6 bludgeoning damage and is compacted. For as long as you maintain concentration the creature takes 1d4 bludgeoning damage per turn and is incapacitated, you may end concentration at any time as a bonus action, and upon releasing concentration the afflicted target is expanded back to it's original size, if there is not enough space to expand fully, the target will stop expanding until there is enough space to fully expand.