伝染病エンジン

Text:

伝染病エンジンが戦場に出たとき、プレイヤー１人を対象とする。そのプレイヤーがコントロールする各クリーチャーの上に－１/－１カウンターを１個ずつ置く。
, ：増殖を行い、その後再び増殖を行う。 （あなたはカウンターの置かれているパーマネントやプレイヤーを望む数だけ選び、その後それぞれに、その上にすでに置かれているカウンターのうち１種類を１個置く。 その後、それを繰り返す。）

Rulings:

• 1/1/2011 You can choose any player that has a counter, including yourself.
• 1/1/2011 You can choose any permanent that has a counter, including ones controlled by opponents. You can’t choose cards in any zone other than the battlefield, even if they have counters on them, such as suspended cards or a Lightning Storm on the stack.
• 1/1/2011 You don’t have to choose every permanent or player that has a counter, only the ones you want to add another counter to. Since “any number” includes zero, you don’t have to choose any permanents at all, and you don’t have to choose any players at all.
• 1/1/2011 Players can respond to the spell or ability whose effect includes proliferating. Once that spell or ability starts to resolve, however, and its controller chooses which permanents and players will get new counters, it’s too late for anyone to respond.
• 1/1/2011 As Contagion Engine’s activated ability resolves, you’ll complete an entire proliferate action, then you’ll complete a second proliferate action. You may choose different players and/or permanents, or different counters on those permanents, when you proliferate the second time.
• 1/1/2011 Players can’t respond between the first and the second proliferate actions.