The Moon's Monster (slow)

Hundreds of years ago, the moon goddess sent a being of both man and wolf down to the earth. It was the strongest and wisest, and was meant to protect all humans.
But it turned dark. It didn't want to be good.
It wanted blood.
It became the darkest being on earth, turning innocent people into werewolves, drinking from rivers of blood, thriving in the death of others.

But a young woman, sent by her village to seduce and kill the monster, softened the beasts heart, so while he was sleeping, she drew a knife and slit his throat. She returned to her village, and was worshipped as a hero.
But when almost a year passed, she bore a child. The monsters child.
The villagers wanted to kill her and the child, but the woman already loved the child dearly, so she hid it away in the woods, and gave herself to the angry villagers, claiming she had killed it herself.
The child grew up alone, never knowing love, and eventually, he became his father.
Dark and sadistic.
He is said to have no mate