ソーサリー
クリーチャー1体を対象とする。それをタップし、それの上に麻痺カウンター3個を置く。(麻痺カウンターが置かれたパーマネントがアンタップ状態になるなら、代わりにそれの上から麻痺カウンター1個を取り除く。)
占術1を行う。(あなたのライブラリーの一番上にあるカード1枚を見る。あなたはそのカードをあなたのライブラリーの一番下に置いてもよい。)
Stun counters replace untapping for any reason, including players untapping tapped permanents during their untap steps.
If a tapped permanent with a stun counter on it would become untapped, a stun counter will be removed from it instead. This is a replacement effect.
You may target a creature that is already tapped with Impede Momentum. If the target creature is tapped as it resolves, you will still put three stun counters on it.
If a permanent has more than one stun counter on it, only one will be removed each time it would become untapped.
If untapping a permanent is part of a cost (such as that of Halo Fountain’s first ability), you may pay that cost by “untapping” a tapped permanent with a stun counter on it. The stun counter will be removed and the creature will remain tapped. However, the cost will still be paid.
Abilities that trigger when a permanent “becomes untapped” won’t trigger if a stun counter is removed instead.