From Ryzom Wiki
In 2504JY he used his influence to exile Mabreka Cho and become Grand Sage after the death of Hoï-Cho. His reign was only two years long though; in 2506JY he had become completely insane and ordered that Zora be closed off to all foreigners. Mabreka seeing this, returned from exile and deposed of Fung-Tun.
During his rule he established Jena as the Kami superior and unsuccessfully tried to convert the Fyros to Jenaïsm.