アーティファクト

, 汚れた印章を生け贄に捧げる:あなたは、このターンにすべてのプレイヤーが失ったライフの合計に等しい点数のライフを得る。 (ダメージによりライフは失われる。)
Tainted Sigil’s ability checks only whether life was lost. It doesn’t care whether life was also gained. For example, say one player lost 4 life during the turn and no one else lost any, but that same player also gained 6 life that turn. That player has a higher life total than they started the turn with — but Tainted Sigil’s ability counts only the life loss, so you’ll gain 4 life.