Along with its defensive and repair facilities, this fortress also houses numerous subterranean vaults in which the Corbettites safeguard various dangerous and even [ deadly] [[Chronology - Volume #|✣ ]] curiosities and horrors which one way or another have ended up in their possession. This collection includes such items as the holy one (seen only in [ retrospective] [[Chronology - Volume #|✣ ]]) and The Beast, which is [ released] [[Chronology - Volume #|✣ ]] by Margarella Selnikov, after which it [ devastates] [[Chronology - Volume #|✣ ]] the Fortress in its vengeful search for metal to devour. A Dreen has even been briefly [ sighted] [[Chronology - Volume #|✣ ]]near the Vaults, though it is not clear if the creature was at one point contained in one of them.