At the beginning of each upkeep, put a strife counter on Crescendo of War.
Attacking creatures get +1/+0 for each strife counter on Crescendo of War.
Blocking creatures you control get +1/+0 for each strife counter on Crescendo of War.
Near Mint - $1.80
Near Mint Non-English - $1.80
Lightly Played - $1.70
Lightly Played Non-English - $1.70
Played - $1.30
Played Non-English - $1.30
Heavily Played - $1.10
Heavily Played Non-English - $1.10
Damaged - $0.90
Damaged Non-English - $0.90