There are two possible outcomes inside: * 1. There may be always a chest inside. When it's opened, demons spawn. Once the demons are killed, upon returning to the exit, an elite pack will appear. * 2. There may be a Hellbreeder Nest event, which requires players to kill Zao'Kapazao as he summons more and more Vile Bats and their nests. This area must be explored in order to complete the achievement Such Great Heights.