A genuinely unique card
The serialized 001/001 version of The One Ring was produced as a single card. Its discovery drew attention well beyond regular Magic: The Gathering collectors and demonstrated how a numbered card can create a documented collecting event.
Why it matters to the registry
Most serialized releases contain a run of numbered copies. The One Ring sits at the extreme end of that idea: one known number and one possible discovery. It remains an important reference point in the history of modern serialized cards.