Wizard's Hat of Conjuratioon
Once per day, you can pull a useful non-magical common item out of this hat. The item must be able to fit through the brim of the hat, so you couldn’t pull out a siege engine or a horse. You could, though, produce a sword, or length of chain, or a saw, or a delicate vase decorated with salacious paintings of frolicking kobolds. The hat can also produce small living creatures, like rabbits or cats or doves or maybe even the aforementioned frolicking kobolds.