Together they established the fundamental principles of the planes: the Unity of Rings, the Rule of Threes, and the Center of All, creating the ring-shape of the cosmos, the triads that dominate it, and the plane of neutrality called the Concordant Opposition or the Outlands.
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Jazirian's realm, known as Uroboros, the Gates of Wisdom, can be found in Solania, the fourth of the Seven Heavens.