Archonisus is the third and final of the gates guarding the Sunwell in the raid instance of Sunwell Plateau. It is found after M'uru has been defeated, and blocks the path leading to Kil'jaeden. On the PTR, the three gates were opened by handing in a quest, although now they will open by themselves over time. Archonisus opened on US servers after an extended maintenance on May 20, 2008.