Arcanery

 is a building of the Overlords.

Background
It costs 7000 Resources to build. Any unit with Builder skill level one can build an Academy if a Supplies Synthesiser, Stronghold, and Gun Tower already exist. This is a school of combat. Inside, an Imperial Guard unit can be trained to become an Exterminator, and if potential exists, an Imperial Guard may become an Elite unit. This structure allows a Citadel to be obtained. An Academy upgrade yields an Arcanery.