War Cadence

Enchantment, 2R (3)
{X}{R}: Creatures can't block this turn unless their controller pays {X} for each blocking creature he or she controls.¹
The rhythm isn't a call to arms, but a signal that the goblins have made a new enemy.
Illus. John Matson

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: 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.
• 10/4/2004: The ability only applies to blocks declared after it resolves. It will not add costs to any blockers already announced.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/6)	Mercadian Masques (Uncommon)