クリーチャー — マーフォーク・ウィザード
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いずれかの対戦相手が自分のライブラリーを切り直すたび、あなたはコーシのペテン師の上に+1/+1カウンターを1個置いてもよい。
Cosi’s Trickster’s ability triggers when an opponent shuffles their library because that player was instructed to do so by a spell or ability that specifically contains the word “shuffle” in its text or (in the case of a keyword ability) in its rules.