Pathaleon the Calculator is the last boss of the Mechanar, which is one of the satellite structures of Tempest Keep. He is the mouthpiece of his demon-crazed master, Kael'thas Sunstrider. He is the head of all the blood elves' devious schemes and has been connected thus far with the massive red crystal at Fallen Sky Ridge in the west of Hellfire Peninsula and a mysterious scheme dubbed "Project at Firewing Point". He is also Kael'thas' personal envoy between all Manaforges in the Netherstorm.