Eight Souls of the Black Sword - Maldicion, Fang of Howling Darkness
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"[Auto] [Player] "Iriuda" [Valid] Square [Trigger] At the start of the Main Phase of your opponent's turn. [Effect] If you have 7 or more cards in your Resource, you may destroy this card. If you do, put 2 cards from the top of your deck into Trash, choose a Black Z/X in your Trash, and make it appear in empty ? Square as Sleep."