A priestly clan of the Common Elf, recent but scholarly in spirit. After Althea was established, the Common Elves chose the Grey elf clan of Mysterion to reveal guidance. Mysterion means secret rites.

Since being chosen, Clan Mysterion has contributed significantly to the research of Astreia. The prophecies they have revealed are also more concise and understandable compared to Clan Hiereus.

亚精灵 的祭司家族，晚近而富学术精神。阿莱西亚 成立后，亚精灵选中了米斯特利恩这一灰精灵家族以揭示指引。米斯特利恩意为* 秘仪。*

自被选中以来，米斯特利恩家族已为 星辰魔法的研究作出了颇多贡献。他们所揭示的谶语，较希琉斯家族 也更加简明易懂。