Hediva Isle is a small island of Caedarva Mire. It contains the NM Khimaira at (I-7). One of the three Engraved Tablets of the ToAU areas is found at I-6. As of July 2007, the purpose of these Engraved Tablets remains unknown.

This region is only accessible if the Treasures of Aht Urhgan expansion is installed and The Road to Aht Urhgan quest is completed. Adventurers can enter from Alzadaal Undersea Ruins (H-9)

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