While War was on his way to kill the spider queen Silitha. He was captured by her Broodlings and brought to the Iron Canopy. The dungeon resembles a medical facility and has spiderwebs everywhere. Deep inside the dungeon you find the Abyssal Chain. With it, you can remove the armor from spider mini-bosses to beat them. After defeating four mid-sized mini-bosses and a huge spider with blue crystals on her back (Broodmother) the entrance to Silitha's lair would open.