Shadow Council is a mission that can be completed at the Utopia HQ and requires the following:
This mission cannot be bought out.
Once the mission is completed, the player will be given a Ministry of Hope astroglass building, whether it does not already exist in the player's Utopia. Otherwise, another Astroglass (residential) building will be given to the player.
Therefore, it is unsure if this mission can be completed more than once. Besides that, the player can still obtain the building 'for free' by splicing all the secret animals.