Mithrisars was the sanctuary of the Twelve of Mithrisars in Eastern Middle-Earth.Here they dug their way through the Underdeeps to the roots of Ambar, where they hoped to find the source of the Flame Imperishable.The subterranean Fortress was also home to their ancient archives and housed their mighty focus-crystal.It was abandoned long ago near the end of the Second Age with the slaying of Príclís, warden of Mithrisars, by Naug Zigildûn I, and the dissolution of the order.

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