2010 Pokemon World Championship Masters Key $66,000 Given to finalists of the 2010 Pokemon World Champion, Masters Key rarity makes it one of the most valuable promotional cards, despite being printed later than most other cards on this list
Kalemne, Disciple of Iroas Kalemne, Disciple of Iroas is more than capable of becoming a massive threat over time
Choose up to 2 of your Pokmon
It no longer lets you cast every spell at instant speed, but that allows us to make cooler cards at better rates
Created in collaboration with John Darnielle, frontman of the titular Mountain Goats, these Mountains feature stunning art alongside even more stunning flavor text, which renowned lyricist Darnielle wrote himself
This rarity is more common in the OCG, but the TCG version of YuGiOh only has one Ultra Secret Rare - the GX Special Edition version of Elemental Hero Wildheart