This is one of the darkest forms of witchcraft. This spell requires offering an animal sacrifice and using its heart to craft the spell. We perform a long ritual that takes us nights of hard work, where we prepare a special altalr, a ritual knife, prepare the sacrifice and perform the sacrificial rituals. It's the spell that entities favour the most due to the extensive blood rituals, and you know, the happier they are, the happier you'll be. Only get this spell if you want absolute control over someone, they will renounce their family if you ask them to, they will give you all their money, all their time, anything you ask for will be yours. 
They will turn to your faithful simp. Can be used for love or for revenge. BUYER BEWARE!