When Unclaimed Bird enters the battlefield, if you're on the Mirran team, choose any number of permanents, then remove from each a counter of each kind already there. If you're on the Phyrexian team, proliferate.
NM-Mint - $41.00
Lightly Played - $36.90
Moderately Played - $32.80
Heavily Played - $28.70
Damaged - $20.50
NM-Mint Non English - $41.00
Lightly Played Non English - $36.90
Moderately Played Non English - $32.80
Heavily Played Non English - $28.70
Damaged Non English - $20.50