|Key Holders||Bifrons, Cutlass Scorpion, Mousse, Succubus Bats, Tonberry Beleaguerer, Tonberry Slasher|
|Notes||Map of the Den of Rancor always obtained first, if the character opening the chest does not have the map|
Dug by the Tonberries, this stretch of tunnel extends deep beneath the Temple of Uggalepih. It is said that the Tonberries chanted curses while digging, and that these curses still remain, embedded within the walls of the caves. Every night, the Tonberries gather here to pledge their hatred towards the five races of Vana'diel. They inflict cuts upon themselves and pour their blood onto altars, hence strengthening their rancor.