The Másra originally were a desert tribe of the Sîrayn.In the early third Age their precursors re-built the city of Tûl Isra and in the 13th century TA Ôbed I of clan Másra first united the tribes of Cénnacatt, Îsra and Kîrm Lesra and established a dynasty that lasted for five generations until it was dethroned by rival clan Bulgan.Twenty years later the Másra heir Bârtek-Tâm returned from the desert and reestablished his dynasty for three more generations until falling again for Clan Bulgan.The Másra survived among the Ayten Nomads and became leading figures in the Tayé faith and among the Kalás-Taibîrauk rebels.