アーティファクト
あなたを攻撃しているすべてのクリーチャーは-1/-0の修整を受ける。
各終了ステップの開始時に、このターンにあなたが4点以上のダメージを受けていた場合、板塞ぎの窓を追放する。
Boarded Window's triggered ability checks the total amount of damage dealt to you during the turn. That damage needn't have been dealt all at once, and Boarded Window needn't have been on the battlefield at the time the damage was dealt. Boarded Window doesn't take into account any life that you gained this turn.