yugioh gemini deck Gem-Knight Sardonyx [DT07-EN014] Common may be 1st or Unlimited Edition Yugioh Deck Review: Structure Deck:

I believe this card will remain in the competitive scene even after Tenpai Dragon's popularity falls down (when future ban lists eventually target it) as it is also reasonably strong against other decks, besides generic

The current crop of lists are more stable and can resolve Creativity more consistently but a single Archon of Cruelty is much more beatable even without the copies of Orvar, the All-Form that many Scales lists pick for what is still admittedly a tough matchup

Only one copy was ever printed, and its been in the hands of one owner since 2005

They let me know in advance who would be coming, what they would be doing