"Please, go ahead, look and see that there is nothing inside the hat, no secret compartments, no hidden items... Good! Now let me show you some magic."
The Wizard reaches into his pointy hat and focuses. Its stars and moons begin to glow. Inside, light wells and flows like a viscous liquid. Then, he withdraws the item of his choosing.
Costs exertion to activate. Roll Perception + Occult. Difficulty depends on specificity of item created ("shirt" would be difficulty 5, "Police uniform" would be difficulty 9). Number of successes determines overall quality and how well the item fits the request. Created object lasts forever. Takes 1 Minute to cast and can produce an item no larger than Fits Inside A Laptop Bag.