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It is the sixth Core Booster of Series 7 after Generation Force

But Kaiba says it's Bakura's own fault

Super Deck 9.9 66 [178178] JP023 Dinowrestler Pankratops Effect Monster - 7 Dinosaur 2600 0 If your opponent controls more monsters than you do, you can Special Summon this card (from your hand)

At first, I had an insane win rate across the field, but after a couple of weeks, I came to two conclusions: The deck is full of air, and if you draw the wrong half, you're toast

So you need to sacrifice something on a turn other than when you originally played it to make use of this, hoping to cast something very large