Infektionsschnalle

Wenn die Infektionsschnalle ins Spiel kommt, lege eine -1/-1-Marke auf eine Kreatur deiner Wahl.
{4}, {T}: Führe Wucherung durch. (Bestimme eine beliebige Anzahl an bleibenden Karten und/oder Spielern und gib ihnen dann von jeder Sorte Marke, die dort bereits liegt, eine weitere Marke.)

Broche de contagio

Cuando el Broche de contagio entre al campo de batalla, pon un contador -1/-1 sobre la criatura objetivo.
{4}, {T}: Prolifera. (Elige cualquier cantidad de permanentes y/o jugadores, luego pon sobre cada uno un contador de cada tipo que ya tenga.)

Boucle de contagion

Quand la Boucle de contagion arrive sur le champ de bataille, mettez un marqueur -1/-1 sur une créature ciblée.
{4}, {T} : Proliférez. (Choisissez n'importe quel nombre de permanents et/ou de joueurs, puis donnez-leur à chacun un autre marqueur de chaque sorte déjà présente.)

Stretta Contagiosa

Quando la Stretta Contagiosa entra nel campo di battaglia, metti un segnalino -1/-1 su una creatura bersaglio.
{4}, {T}: Prolifera. (Scegli un qualsiasi numero di permanenti e/o giocatori, poi metti su ognuno un altro segnalino di ogni tipo già presente.)

伝染病の留め金

伝染病の留め金が戦場に出たとき、クリーチャー１体を対象とする。それの上に－１/－１カウンター１個を置く。
{4},{T}：増殖を行う。（望む数のパーマネントやプレイヤーを選び、その後、すでにそこにあるカウンター１種類につき、そのカウンターもう１個を与える。）

Gancho de Contágio

Quando Gancho de Contágio entrar no campo de batalha, coloque um marcador -1/-1 na criatura alvo.
{4}, {T}: Prolifere. (Escolha qualquer número de permanentes e/ou jogadores. Em seguida, dê a cada um deles outro marcador de cada tipo que eles já tenham.)

Contagion Clasp

When Contagion Clasp enters, put a -1/-1 counter on target creature.
{4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Fallout

When Contagion Clasp enters the battlefield, put a -1/-1 counter on target creature.
{4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Phyrexia: All Will Be One Commander

Time Spiral Remastered

The List

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.

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

An ability that triggers "Whenever you proliferate" triggers even if you chose no permanents or players while doing so.

If a permanent ever has both +1/+1 counters and -1/-1 counters on it at the same time, they're removed in pairs as a state-based action so that the permanent has only one of those kinds of counters on it.

If a player or permanent has more than one kind of counter on it, and you choose for it to get additional counters, it must get one of each kind of counter it already has. You can't have it get just one kind of counter it already has and not the others.

Players can respond to a 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.

To proliferate, you can choose any permanent that has a counter, including ones controlled by opponents. You can choose any player who has a counter, including opponents. You can't choose cards in any zone other than the battlefield, even if they have counters on them.