Atem and Set were once friends, but they later became enemies due to disputes over the allocation of Leyline Ore. This conflict sparked the Great War of Kronus. Atem's army emerged victorious following Set's sudden absence, but as the victors prepared to leave the planet, their fleet exploded, killing nearly the entire titan population. Atem managed to escape the explosion and set off for Vathria in search of the Source of Elements, later forming an alliance with the dwarves. A new war erupted with Set in Ekenvir, where the dwarven prince Norn killed Set by overloading his core, resulting in the shattering of the Source of Elements.