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Each convention-exclusive Mystery Booster pack will contain fifteen cards: fourteen from the gigantically awesome main set, and one from that "something new and surprising" group

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R Rare Heavy Freight Train Derricrane X EARTH Level 10 [ MachineEffect ] ATK 2800 DEF 2000 If an EARTH Machine monster(s) is Normal or Special Summoned to your field (except during the Damage Step): You can Special Summon this card from your hand, but its original ATK/DEF become halved