User blog comment:Evans0305/Cult of Rapture: The Secrets of Minerva's Den/@comment-24.217.232.167-20100915023342/24.217.232.167-20100915122616/Willbachbakal-20100915163722/24.217.232.167-20100915204838/Pauolo-20100915210413

Take a look on Persephone's trivia, it explains what is the "luminescent biomass".