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 - $38.00
Lightly Played - $36.10
Moderately Played - $34.20
Heavily Played - $30.40
Damaged - $24.70
NM-Mint Non English - $38.00
Lightly Played Non English - $36.10
Moderately Played Non English - $34.20
Heavily Played Non English - $30.40
Damaged Non English - $24.70