Space Items!
The mere possibility made Richard's breath catch in his chest.
A space item!
Having an internal space built into it where you could store various needed items and retrieve them when necessary, could indeed explain why the Mysterious Wizard didn't carry anything on his person.
Maybe in many modern Earth novels, such an item is so widely used that it has become clichéd. However, Richard was keenly aware of what it would mean if such a thing truly existed.
It meant that the magic of the Wizards in this world had achieved what even modern Earth's technology has yet to accomplish.
It meant that the magic of the Wizards might be an existence more advanced than modern Earth, possibly by several hundred years of new scientific technology.
Excessively advanced science is always considered magic, this saying is universal.
Just like video calls on modern Earth could completely pretend to be Heavenly Ear Technique or Heavenly Vision.