Card not found (rare), on the other hand, won a Pro Tour in the hands of Gerry Thompson as a part of a Monoblack Zombie deck, which was able to abuse both of its abilities to gain a lot of advantage
Powered by the incredible Shaddoll Fusion Spell Card that lets you Fusion Summon using monsters in your Deck, Shaddolls can Summon "Shaddoll" Fusion Monsters of any Attribute and stack up powerful Graveyard effects at the same time
If you won a Red Eyes Black Dragon from Joey or you added Swordstalker and Pumpking the King of Ghosts to your deck, use them in a battle with any monster Yugi summons out in the field while approaching him
This answers competitive relevance, not which card has the highest rarity
Therefore, it's important to have a deck that's strong, reasonably easy to play, and affordable
Collectors see the lack of shadow and know the rarity and value are there