結界
在你的結束步驟開始時,若你僅操控一個生物,將一個5/5黑色,具飛行異能的惡魔衍生生物放進戰場。
If you control zero creatures or more than one creature at the beginning of your end step, the ability won’t trigger. If you control zero creatures or more than one creature when the ability resolves, it will do nothing.