Orc Iron Rings

They look like regular iron. However there are black veins and tendrils that spread out of the ring and attach themselves to the wearers hand.

They are a magic item that requires no attunement slot. They can not be taken off involuntary (unless you take them off a person cold dead hand). To put on a ring the pass phrase must be spoken "Îmi jur credință" which is celestrial for "I swear my alligence."