Crescendo of War CMD-12/5075 (The List Reprints)

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.

NM - $6.70
LP - $5.30
MP - $4.00
HP - $2.70
DMG - $1.50