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.
Near Mint - $34.70
Lightly Played - $27.80
Moderately Played - $24.30
Heavily Played - $20.80
Damaged - $17.40
Near Mint Spanish - $34.70
Lightly Played Spanish - $27.80
Moderately Played Spanish - $24.30
Heavily Played Spanish - $20.80
Damaged Spanish - $17.40