血清の粉末 {3}

アーティファクト

{T}：あなたのマナ・プールに{1}を加える。

あなたがマリガンをできる状態で、あなたの手札の中に血清の粉末があるなら、あなたの手札をゲームから取り除いて同じ枚数のカードを引いてもよい。（マリガンを行っていてもこれを行える。）

Illustrated by Matt Thompson

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Only the English version of a Magic card receives Oracle updates and errata. View this card in English. (Scryfall note)
You can use Serum Powder's second ability only while it's in your hand. If this card is in your hand, you can choose either to mulligan or to use Serum Powder's ability. Using the ability doesn't prevent you from taking further mulligans, and taking a mulligan doesn't prevent you from using a Serum Powder's ability if you happen to draw one in your new hand. (2017-11-17)

The cards in your hand are exiled for the rest of the game; they aren't shuffled back into your library if you take another mulligan. Cards exiled are always face up unless the effect that exiled them says they aren't. Be sure to return those cards to your deck for your next game. (2017-11-17)