The Brotherhood of Ak'rei'an was a large organization on Terros-Nui, created by the player Evangelion Unit-04 in early January 2006. They were considered one of the main antagonistic organizations at the time. They were best known for their ability to summon a very large variety of undead. Most of the players who once made it up have since left the BZPRPG. A modern incarnation was revived in 2013.