 The quori lifecycle is somehow connected to Eberron; specifically, each new Age on Eberron changes the nature of Dal Quor, causing the otherwise immortal Quori to die and be reborn into a form more fitting to the new age.40,000 years prior to the end of the Last War, the quori of that age invaded Eberron in an attempt to prevent the dawning of a new age but were repelled by the giants of Xen'drik, who managed to sever all connections between Eberron and Dal Quor using immensely powerful magic.The current Quori are servants of a potent evil, called Il'Lashtavar or "the Dreaming Dark", which dwells within the heart of Dal Quor.