Surrvogel

Fliegend
Immer wenn der Surrvogel einem Spieler Kampfschaden zufügt, 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.)

Colibrí retumbante

Vuela.
Siempre que el Colibrí retumbante haga daño de combate a un jugador, prolifera. (Elige cualquier cantidad de permanentes y/o jugadores, luego pon sobre cada uno un contador de cada tipo que ya tenga.)

Colipervier

Vol
À chaque fois que le Colipervier inflige des blessures de combat à un joueur, 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.)

Strimpellibrì

Volare
Ogniqualvolta lo Strimpellibrì infligge danno da combattimento a un giocatore, prolifera. (Scegli un qualsiasi numero di permanenti e/o giocatori, poi metti su ognuno un altro segnalino di ogni tipo già presente.)

かき鳴らし鳥

飛行
かき鳴らし鳥がプレイヤー１人に戦闘ダメージを与えるたび、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１個を与える。）

Colibri Tamborilante

Voar
Toda vez que Colibri Tamborilante causar dano de combate a um jogador, 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.)

Бренчуга

Полет
Каждый раз, когда Бренчуга наносит боевые повреждения игроку, используйте Распространение. (Выберите любое количество перманентов и/или игроков, затем дайте каждому из них еще по одному жетону тех типов, которые у него уже имеются.)

敲击鸟

飞行
每当敲击鸟对任一牌手造成战斗伤害时，增殖。（选择任意数量的永久物和／或牌手，然后为其已有之每种指示物各多放置一个同类的指示物。）

敲擊鳥

飛行
每當敲擊鳥對任一玩家造成戰鬥傷害時，增殖。（選擇任意數量的永久物和／或玩家，然後為其已有之每種指示物各多放置一個同類的指示物。）

Thrummingbird

Flying
Whenever Thrummingbird deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Commander Masters

Phyrexia: All Will Be One

Flying
Whenever Thrummingbird deals combat damage to a player, proliferate.

New Capenna Commander

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.