Qre

Qre is a barren rock of a planet, claimed by the Decepticons and partially Cyberformed for their use as a training ground.

Con Universe
Qre was a notably unremarkable planetary body chosen by Jhiaxus as the location for his secret base. The Decepticons claimed Qre for their Empire and transformed at least a portion of Qre to resemble Cybertron and constructed an elaborate automated weapons system for the purpose of training his newly created Cybertronian Decepticons.