The Bastion of Horror was released on 10th of June 2015. During this event, players can gain stars for their Brotherhood and runes for random prize drops. Later in the event, Brotherhoods are put into leagues to fight against eachother in order to win more Artifacts.
Every 3 hours you can enter the Bastion of Horror and fight on unique maps with free armies that are provided for every map. The 3-hour cooldown can be skipped in exchange for gems.
On the Bastion maps you receive special runes. You can open the Wraith Portal using them and gain unique prizes: special units. mighty spells, valuable resources and an ancient artifacts. The prizes drop randomly.
If you have a brotherhood, you can take part in a Tournament. Important: there should be 5 or more players in the brotherhood to participate. When they collect 15 stars in Bastion battles in sum, they enter the Tournament. When you collect 25 stars, you are eligible for the Tornament rewards.