Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)
In an aggro deck, you wont find many cards with a high mana cost, and as a result, most cards wont be super powerful or game-changing on their own
It doesnt get any more speculative than that, Im serious, this is a really bad and risky idea
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Booster boxes cost $90-$180 depending on the set, which breaks down to $2.50-$5.00 per pack
Serialized cards are localized in English only but can be found in Tarkir: Dragonstorm Collector Boosters of any language