Microplanes

=Microplane= 3rd level conjuration
 * Casting Time: 1 action
 * Range: Touch
 * Components: S
 * Duration: Permanent
 * Classes: Warlock, Wizard
 * You create a shadowy door on a flat solid surface that you can see within range. The door is large enough to allow Medium creatures to pass through unhindered. When opened, the door leads to a demiplane that appears to be an empty room 10 feet in each dimension, made of sturdy grey metal.