The most valuable cards include 1st Edition Base Set holographics (especially Charizard), Shadowless prints, Gold Star Pokemon, Illustrator Pikachu, Trophy cards, Japanese exclusive promos, and modern chase cards like Alt Art and Rainbow Rares from recent sets
Some of the more sought after (read: expensive) cards on this list are: The original five Phyrexian Praetors Ragavan, Nimble Pilferer Atraxa, Praetors' Voice Skithiryx, the Blight Dragon The Brothers' War The Brothers War was the first official printing of serialized cards, and it was hot out of the gates with all 63 of the cards on the Retro Artifacts bonus sheet included in their sketch printings
Finally, the Sapphire and Steel deck focuses on quickly building up a players Inkwell and getting powerful cards that can protect each other onto the playing field
C Common Hourglass of Life X LIGHT Level 2 [ FairyNormal ] ATK 700 DEF 600 This creature grants power instead of shortening life
Wroughtweiler - (Air) A furious dog-like attack Elemental HERO Necroshade - + (Air) Performs a series of slashes Neo-Spacian Dark Panther - + (Air) Performs upward lunge attack