Arcane Window

You create an arcane window with a radius of 3 feet on a surface you touch, allowing you to see and pass through surfaces 4 inches thick. Until being passed through, the window is one way, remaining hidden except from magical means of discovery. The window can only be passed through by the caster and any creatures or objects the caster is wearing or is in contact with, up to a maximum of 300 pounds. To all others, the window is solid, acting as if it were not there, meaning sound, objects, and other creatures cannot pass through it. The spell ends once 10 minutes have passed, if the surface the spell was casted on is destroyed, or once dispelled.