When touching an amulet of silver and jewel or obsidian and jewel, you can cast Absolute Loyalty which will allow you to pick one being within 150ft of the caster now as long as they aren't a God or Arch Devil and make them completely loyal to the caster to the extent where the effected being will die for the caster and will follow their orders to the death.

The duration of this spell depends on the WIS saving throws that are made for this spell. 

The first saving throw would be 12 hours after the spell is cast, if the first throw is failed the second saving throw will take place 1day after the first throw, if the second throw is failed the third saving throw will take place 1 week after the second saving throw.

    If the third throw is failed, then the being that was targeted and has failed the three saving throws is loyal to the caster for the rest of their lives or until they are released from absolute loyalty.