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The nephalem were aware of their own divided natures, and as such, created their Temple Guardians to be incorruptible. The Temple of the Firstborn was constructed in honor of these early nephalem. Tyrael would later believe that some early nephalem were born more demon than angel, resulting in Phantasms that would haunt Sanctuary far into the future. It is known that these Ancients developed along different lines from each other, including the cultures they fostered. Millennia after their birth, Deckard Cain speculated that thousands, perhaps tens of thousands of these Ancients existed, though by the time of his life, only the names of Bul-Kathos, Vasily, Esu, and Rathma were remembered, and treated more like deities. It is believed that they set out exploring, seeking answers, attempting to understand the world in which they lived. The first generation of nephalem were called the Ancients. Thus, the nephalem were born-the children of both angels and demons, yet a new entity in their own right. In time, other renegade demons and angels did likewise and produced offspring of their own. In an act without precedent, Inarius and Lilith mated and created offspring. They led a group of renegade demons and angels where they created a new world through the Worldstone, one where they would be free from the Great Conflict. Sanctuary was created by the rogue angel Inarius and his demon confidante, Lilith.
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