A belt once belonging to Jacob Kurtzberg (more commonly known as comic-book legend Jack "The King" Kirby) possesses, as the agents of Warehouse 13 are aware, the ability to manipulate the density of anyone who wears it. Noted not to be in the Warehouse at the time of the episode.

Claudia thought this could be the artifact that was giving the Iron Shadow his super powers. However, it was later discovered to be Angelo Siciliano's Workout Trunks, which have near-identical abilities to the belt.