Mirror of the Stars

The Mirror of the Stars is a recurring artifact that appears in Paper's series. It has so far appeared in both Ben 10: Bio Squad and it is confirmed to appear in Young Plumbers. Whenever the mirror appears, so does Virton.

Ben 10: Bio Squad
The mirror appears in Staying in Touch when the knights use it to free Virton from his prison. Eventually, Virton steals the mirror and uses it to go to a currently undisclosed location.

Young Plumbers
It is confirmed to appear in Field Trip when Virton steals the mirror from its vault in a Galactic Bank. Eventually, the other copies of the mirror in other dimensions activate and bring heroes from 8 other worlds to stop Virton. This confirms that each dimensions has its own copy of the mirror.