Nests are isolated zones wherein access is restricted except to those who hold particular items that grant entry to that particular zone. Nests are usually created by powerful creatures to control the entry of those who wish to enter their realm or simply for defensive purposes. Entering a nest unprepared is, most of the time, a swift death sentence due to the powerful creatures who reside the nest, including the nest's owner itself.
As on 90 cap, four man Nests do not require entry tickets to play. Eight man Nests require tickets for a limited time.