Very Rare Adventuring Gear (Manacles), Requires Attunement

You can spend one minute putting these manacles on an incapacitated or willing creature. They can be put on creatures of size huge or smaller. 

After these manacles are applied, they transform into a set of decorative golden chains around the creature’s body. These chains don’t hinder the creature in any physical way, and they can only be removed by using an action, or if you lose attunement.  

While attuned to the item, you always know how far it is and in what direction.
The range required to start losing attunement to this item is extended to 1 mile. 

Otherworldly Enslavement. An elemental, fey, fiend, or undead creature wearing these manacles is forced to obey your verbal commands to the letter, though it might try to twist your words if it is intelligent enough. It understands you, even if it doesn’t speak your language. The creature is also unable to cause you any direct harm, or knowingly assist in actions that would do so.

Planar Chains. As long as you are attuned to the item, a creature wearing this item cannot move further than 1 mile away from you unless allowed to do so.
As long as the creature is within 1 mile from you, you can use your action to teleport it to an unoccupied place within 30 feet of you.
The creature is also unable to be on a different plane of existence than you, being immediately teleported within 30 feet of you if it were to happen.