Spell: Extradimensional Cover

You've learned how to bring extradimensional spaces filled with debris into your current reality. You create this extradimensional cover in a square within range that is either empty or occupied by you or an ally. The extradimensional cover doesn't impede movement through it, but only you and your allies can end your movement in the space. If another creature attempts to end their movement in the cover, they are pushed to the nearest unoccupied space chosen at random. The space merges reality with your demiplane, creating swaths of semi-real debris which provide standard cover to any creature occupying the space.