ソーサリー
クリーチャー1体を生け贄に捧げる。そうしたとき、ターン終了時まで、すべてのクリーチャーは-X/-Xの修整を受ける。Xは、その生け贄に捧げられたクリーチャーのタフネスに等しい。
You don’t choose which creature to sacrifice until Tip the Scales resolves. You must sacrifice exactly one creature if you control one at that time. Doing so causes a “reflexive” ability to trigger. Players may respond to that ability knowing the value of X.
Use the sacrificed creature’s toughness as it last existed on the battlefield to determine the value of X.