Elesh Norns Chormeister

Fliegend, Erstschlag
Immer wenn ein Kommandeur, den du kontrollierst, ins Spiel kommt oder angreift, führe Wucherung durch.

Maître de chapelle de Norn

Vol, initiative
À chaque fois qu'un commandant que vous contrôlez arrive sur le champ de bataille ou attaque, proliférez.

ノーンの聖歌隊長

飛行、先制攻撃
あなたがコントロールしている統率者１体が戦場に出るか攻撃するたび、増殖を行う。

艾蕾侬的合颂领

飞行，先攻
每当一个由你操控的指挥官进战场或攻击时，增殖。

Norn's Choirmaster

Flying, first strike
Whenever a commander you control enters or attacks, 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

Flying, first strike
Whenever a commander you control enters the battlefield or attacks, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Flying, first strike
Whenever a commander you control enters the battlefield or attacks, proliferate.

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.

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.