Cheapest priced copy (The List): $2.79 at Card Kingdom, near mint, their price list as of .
Crescendo of War 
Enchantment · Rare · The List · #CMD-12
At the beginning of each upkeep, put a strife counter on this enchantment.
Attacking creatures get +1/+0 for each strife counter on this enchantment.
Blocking creatures you control get +1/+0 for each strife counter on this enchantment.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $2.79 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2011 | 12 | Rare | $3.49 | — |
| The List | CMD-12 | Rare | $2.79 | — |
One ruling from Wizards of the Coast
- 22 September 2011In a Two-Headed Giant game, the first ability triggers once during each team’s upkeep.