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 - $9.75
Lightly Played - $9.25
Moderately Played - $7.75
Heavily Played - $6.00
Damaged - $5.00
Near Mint Non-English - $9.75
Lightly Played Non-English - $9.25
Moderately Played Non-English - $7.75
Heavily Played Non-English - $6.00
Damaged Non-English - $5.00