This piece won't be so detailed in the main game, so I don't think it's a spoiler, but it gives an idea of the game's universe, so I'll just leave it here to saturate the blog with various information.

In ancient times, two revenants (energy vampires) lived in the Valley of Hem, they were bosom friends during their lifetime and remained so after the transformation. One of them, named Aurelian, became an Emperor, because he was able to lead people by the power of words, he was also called the Golden Tongue. The second, named Kaayn, became his commander. Kaayn soon discovered that the more energy they suck out of sane beings, the stronger they become. They (he and his soldiers) began to keep people like cattle, sucking them out by the hundreds, and even drank their real blood and made sacrifices. The Emperor did not like it, he came to Kaayn and demanded to stop the tyranny over people.

But Kaayn refused him outright, citing the necessary sacrifices for the sake of might, and also believing that the Golden Tongue would not dare to go against his closest friend. He was mistaken: The Emperor ordered to skin him alive and chain him in a distant cave underground so that he could not even feel the faraway breath of a living person and could not be cured. All those who tried to enter the cave where Kaayn was languishing were executed by the Emperor. He issued laws that established rules for feeding from people. Revenants cannot live without human energy, but since then, no one, under threat of death, could do this arbitrarily and without knowing the measure.

Later, the story tells that Kaayne, locked up for eternal suffering in prison, who had accumulated impressive strength before, learned over the years to control the chains as if they were his own limbs. Years passed, and Aurelian softened towards his friend, his conscience began to torment him. Accompanied by his retinue, he personally descended to the prison appointed by himself, but he no longer found Kaayne or the chains binding him there.