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 - $13.00
Lightly Played - $11.70
Played - $9.10
Heavily Played - $7.80
Damaged - $6.50
Near Mint Non-English - $13.00
Lightly Played Non-English - $11.70
Played Non-English - $9.10
Heavily Played Non-English - $7.80
Damaged Non-English - $6.50