THE HOLLOWS:

"Several years ago the Trolls wanted to carve out more territory for themselves but were having trouble doing that above ground. They decided to try and expand downward. The location they chose for their excavation was called Eastgate. It was a lovely residential area that had a nice view of the ocean. Armed with high explosives the Trolls headed into the sewers with the intent of blasting open a large area. What they didn’t know that that there was already an extensive cave warren beneath this area of Paragon City. Their initial blasts destabilized a large area and collapsed a section of the zone in on itself. When the dust settled the surviving Trolls realized that they had found an excellent area for expansion. This event became known as the Hollowing. The Trolls moved in quickly and took over a large section of the tunnels, but they didn’t have enough numbers to completely cover the area. The Outcasts moved one of their splinters in, delighting in any opportunity to balk their brutish enemies. The Circle of Thorns almost immediately began sending in search teams looking for a powerful mystic portal that was rumored to exist in the area. Finally the Trolls encountered creatures never before seen, which they promptly dubbed “Igneous”. It is believed that these cave guardians are connected to the devouring earth, but no one is certain."