8 Poseidra Abyss, The Atlantean Dragon Lord Quarter Century Rare $93.43 A Powerful Sea Serpent Extra deck monsters tend to be some of the most valuable cards in the Yu-Gi-Oh
The fact that only staff were given this card, means its an extremely scarce and rare Pokmon card in fact, not many copies exist
While the source of spoilers doesnt often register on many players radars, this one may be the exception
It boasts a host of taxation (Ghostly Prison), prevention (Blazing Archon), and protection (Teferi's Protection) effects that make attacking you difficult, if not impossible
Another one that got an audible gasp when I first saw it, this Kaya starts big and runs that way
Based on the latest market prices tracked on TCG Stacked, Urza's Mine is worth about $14.09 USD