Trap
NormalMaraimei, the Igniting Inferno
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52
[REQUIREMENT] When your opponent Normal or Special Summons a Level 6 or higher monster(s) face-up, and you have a face-up "Summoned Skull" or a face-up Level 7 or higher Fiend Type Normal Monster on your field. [EFFECT] You take damage equal to [the number of monsters in your opponent's Graveyard] x 100. Then, shuffle all monsters from your opponent's Graveyard into the Deck.