Flying Whenever Thrummingbird deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
NM-Mint - $0.25
Lightly Played - $0.23
Moderately Played - $0.20
Heavily Played - $0.17
Damaged - $0.13
NM-Mint Non English - $0.25
Lightly Played Non English - $0.23
Moderately Played Non English - $0.20
Heavily Played Non English - $0.17
Damaged Non English - $0.13
Foil Prices
NM-Mint Foil - $0.90
Lightly Played Foil - $0.80
Moderately Played Foil - $0.70
Heavily Played Foil - $0.70
Damaged Foil - $0.50
NM-Mint Foil Non English - $0.90
Lightly Played Foil Non English - $0.80
Moderately Played Foil Non English - $0.70
Heavily Played Foil Non English - $0.70
Damaged Foil Non English - $0.50