Amulet of the Bonded Beast

This dark red ruby amulet is held in place by black wire metal, and hung from a black iron chain. While attuned to this amulet, you can as an action, once per day, touch a companion creature you are bonded with, and transport them into a pocket dimension held in the ruby. While within the ruby, the companion is incapacitated, and if unconscious, is immediately stabilized, regaining 1 hit point after 1 hour. As a bonus action you can release the companion from within the ruby.