Flying Clockwork Avian enters the battlefield with four +1/+0 counters on it. At end of combat, if Clockwork Avian attacked or blocked this combat, remove a +1/+0 counter from it. {X}, {T}: Put up to X +1/+0 counters on Clockwork Avian. This ability can't cause the total number of +1/+0 counters on Clockwork Avian to be greater than four. Activate this ability only during your upkeep.
Near Mint - $400
Lightly Played - $400
Moderately Played - $300
Heavily Played - $300
Damaged - $200
Near Mint Spanish - $400
Lightly Played Spanish - $400
Moderately Played Spanish - $300
Heavily Played Spanish - $300
Damaged Spanish - $200