Whenever a commander you control enters the battlefield or attacks, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Near Mint - $4.50
Lightly Played - $4.25
Moderately Played - $3.50
Heavily Played - $2.75
Damaged - $2.25
Near Mint Non-English - $4.50
Lightly Played Non-English - $4.25
Moderately Played Non-English - $3.50
Heavily Played Non-English - $2.75
Damaged Non-English - $2.25