Manaforge

A manaforge is a structure that harvests mana from the Twisting Nether and converts it into energy. The only known manaforges exist in Netherstorm, constructed by the blood elves under Kael'thas using parts salvaged from Tempest Keep. While in service, the manaforges produced a large number of mana cells which were used to further Kael's plans in summoning Kil'Jaeden on Azeroth.

Manaforges are considered dangerous and detrimental to the landscape. Netherstorm's deterioration was only accelerated when the manaforges went active, causing several catastrophic anomalies and voidwalker infestations. Due to these threats, organizations such as the Scryers and Aldor worked together to destroy Kael's forces and permanently shut down the manaforges.