Crescendo of War

Spirale di Guerra (Crescendo of War) (it)

Enchantment (CMC 4)
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.