Grail building
Grail building is a special building that can be constructed if a player manages to find the grail artifact. To build it, a hero with the grail artifact must bring the artifact to the desired town and click the village hall/town/city hall/capitol. The grail building produces 5000 extra gold per day and increases creature growth of the city by 50%. In addition, the grail structure has special abilities that depend upon which town type it is build.