Trasder, one of the Four Great Brothers was placed in Gruissiono with the Matoran on a piece of land, Matoran to inhabit it and keep it safe. Trasder built a huge village on Gruissiono, with the Matoran helping him. The island soon became a city completely. The Matoran were rescued many years later by Tapio, Turaga Matthew and Zuxan. The inhabitants then helped in the final battle against Grandeg's Robots which they won, saving the Four Great Lands in the process. The citizens of Gruissiono began rebuilding their city, trying to make it as beautiful as it had always been.