The creature doesn't have its printed name, any of its printed text, etc
This Delta Species Charizard was included as a Rare Holo Star in Dragon Frontiers packs, and only one star mon card could be included in any deck you built
Mill strategies rarely work out in Limited, mostly because actually effecting the board is all important, and mill has almost no effect on the game until your opponent actually runs out of cards
But at least so far, none of the Secret Lair drops can really be considered a bad deal from a financial perspective (and this is without considering the possibility of getting a valuable bonus card)
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'A Fight for Survival in the Arena!' is a Fighting-type themed Secret Mission and here are the cards you need to complete it: Gligar #74 (One Diamond) Gallade #84 (Three Diamond) Thorh #85 (One Diamond) Sawk #86 (One Diamond) Bewear #91 (Two Diamond) Arena of Antiquity #154 (Two Diamond) Rewards: 12 Wonder Hourglasses and 2 Shop Tickets