sentences:  After the Mongol conquest, the Bavandis continued to rule as local strongmen of Tabaristan and sometimes Dailam.Their power was finally brought down around 1350 when Kiya Afrasiyab of the Afrasiyab dynasty, themselves an offshoot of the Bavandis, managed to kill Hasan II of Tabaristan, the last of the mainline Bavandi kings.The Bavandids stressed their lineage with the Sasanian Empire.