Soulmates found one story at a time.

In the Aztlan pantheon, Tezcatlipoca is a creator god of sorcery, night, shadow, smoke, obsidian mirrors, and jaguars. He ruled Aztlan as the First Sun.  

Overthrown by Quetzalcoatl, as Tezcatlipoca lays dying, a skeletal man with white hair and eyes offers him a chance to get revenge… all Tezcatlipoca has to do is stab him with a white knife. 

For thousands of years, a hybrid of Tezcatlipoca and the Scorpion Mage rule Aztlan, biding their time until they take over during the Fifth Sun.