Thir

Thir, draconic for Three, is the term given to the faith followed by most dragons of Argonessen, almost entirely unknown to the inhabitants of Khorvaire outside of individual dragons and scattered dragonborn clans. Adherents to this religion believe that the Progenitor Dragons, Eberron, Siberys, and Khyber, were the forces responsible for the world's creation and its inhabitants, and the Draconic Prophecy's existence in the world is a reflection of the Progenitor's Dragon's plans for creation. However, while the Progenitors are powerful beings deserving of respect, Siberys is dead, and Eberron and Khyber are too powerful and great to hear prayers and worship. More relevant to daily life than the Progenitors, the dragon gods are believed to live outside of the known planes and world, with ten deities viewing and quietly influencing the world, observing through and represented by a particular constellation each. The exception to this is the Daughter of Khyber, sometimes called Tiamat, who is bound as an Overlord deep within the earth.
Below them, the Sovereigns of the Sovereign Host and Dark Six are believed to be ascended dragons, with a dragon who spends their life personifying a particular concept able to replace a Sovereign on their death. The Sovereigns are thought to be the gods of lesser creatures, unconcerned with dragons, and given a long but finite reign to oversee the smaller peoples of the world.