There are regions where vharin, or aether to priests, is markedly denser; its currents slower and more readily grasped and absorbed. The Wizard Kingdom of Yettyr upon the eastern Ocean of Storms and the Mage Conclave of Thessiar in the far southwest are the most prominent examples. In these lands, the Mage-King of Yettyr and the Supreme Council of Thessiar routinely work enchantments of a scale and precision that would be prohibitively difficult, if not impossible, elsewhere. Geography, it seems, can be as much a factor in arcane potency as talent or training.
— from the research notes of Zyr’Magi Tes’Lothen, “Magi the Blade”, high-aelv scholar, mage, and swordsman
