The Falchion's Blessing

Whenever you cast your commander, you may
pay {4} and create a legendary artifact equipment
token with, "When this enters the battlefield,
attach it to your commander. Equipped creature
has +1/+1 for each commander on the battlefield.
This may only be attached to your commander." Destroy it once your commander leaves the battlefield. This ability cost {1} more to active for
each time you have cast you commander this
game.
This card is not an actual card.