Gancho de Contágio

Text:

Quando Gancho de Contágio entrar no campo de batalha, coloque um marcador -1/-1 na criatura alvo.
, : Prolifere. (Você escolhe um número qualquer de permanentes e/ou jogadores com marcadores sobre eles e depois dá a cada um outro marcador de um tipo que eles já tenham.)

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 Contagion Clasp’s first ability is mandatory. If you’re the only player who controls a creature, you must target one of them.