The rhythm isn't a call to arms, but a signal that the goblins have made a new enemy.

Dieser Rhythmus ist ein Signal, dass die Goblins einen neuen Feind gefunden haben.

Kriegskadenz

{X}{R}: Kreaturen können in diesem Zug nicht blocken, falls ihr Beherrscher nicht {X} für jede blockende Kreatur bezahlt, die er kontrolliert.

El ritmo no es una llamada a las armas, sino una señal de que los trasgos se han ganado otro enemigo.

Cadencia de guerra

{X}{R}: Este turno, las criaturas no pueden bloquear a menos que su controlador pague {X} por cada criatura bloqueadora que controle.

Ce n'est pas un appel aux armes, mais le signal que les gobelins ont un nouvel ennemi.

Cadence de guerre

{X}{R} : Ce tour-ci, les créatures ne peuvent pas bloquer à moins que leur contrôleur ne paie {X} pour chaque créature bloqueuse qu'il contrôle.

Il ritmo non è una chiamata alle armi, ma un segnale che i goblin si sono fatti un nuovo nemico.

Cadenza di Guerra

{X}{R}: In questo turno, le creature non possono bloccare a meno che il loro controllore non paghi {X} per ogni creatura bloccante che controlla.

あのリズムは軍の動員命令ではない。ゴブリンが新しい敵を作ったという合図なんだ。

戦いの連打

{X}{R}：このターン、クリーチャーは、そのコントローラーが自分がコントロールするブロック・クリーチャー１体につき{X}を支払わないかぎり、それではブロックできない。

War Cadence

{X}{R}: This turn, creatures can't block unless their controller pays {X} for each blocking creature they control.

Commander 2013

{X}{R}: This turn, creatures can't block unless their controller pays {X} for each blocking creature he or she controls.

Mercadian Masques

o
Xoo
R Creatures can't block this turn unless their controller pays o
X for each blocking creature.

The ability only applies to blocks declared after it resolves. It will not add costs to any blockers already announced.

You can choose X=0. This doesn’t have an effect most of the time, but it does mean that creatures can’t block unless the controller chooses to pay the cost (a cost of zero is not automatically paid). You can use this to make your creatures unable to block an attacker.