A ysalamiri cage mounted on a Mobile Defense Unit. Mobile Defense Units belonging to the Zann Consortium were equipped with the ysalamiri cage. To create Force-dead zones, the Consortium utilized these cages, each housing a ysalamir brought from Myrkr. This rendered the areas occupied by the cages inaccessible to users of the Force, thus providing the Consortium's forces with a tactical edge against Force-sensitive individuals.
The only instance of this being canon occurred during the Theft on Coruscant. Within the game, the construction of ysalamiri cages is restricted to times when the Zann Consortium has control over Myrkr.