I should stress that Timmies don't like cards because they're expensive
Color Identity: R, G, W, U Cards Samwise Gamgee Bill the Pony Phyrexian Altar Animar, Soul of Elements Initial Card State Bill the Pony in hand
As for all the eras, the Charizard version is the most valuable, both to do with rarity and the fact that the holofoil makes it easier to spot imperfections
Mystical Tutor, Enlightened Tutor and Gamble all fall under the limit, and if you've got your Leyline of Anticipation or Vedalken Orrery on the field, you can even mutate Vadrok at instant speed and throw any of a number of counterspells onto the stack
If you do, defending player draws all mana from lands he or she controls
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