かき鳴らし鳥

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Efrem Palacios

飛行
かき鳴らし鳥がいずれかのプレイヤーに戦闘ダメージを与えるたび、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。）

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.