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 only during your upkeep.
NM-Mint - $17.30
Lightly Played - $16.40
Moderately Played - $14.70
Heavily Played - $13.00
Damaged - $10.40
NM-Mint Non English - $17.30
Lightly Played Non English - $16.40
Moderately Played Non English - $14.70
Heavily Played Non English - $13.00
Damaged Non English - $10.40