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 - $23.40
Lightly Played - $21.10
Moderately Played - $18.80
Heavily Played - $16.40
Damaged - $11.70
NM-Mint Non English - $23.40
Lightly Played Non English - $21.10
Moderately Played Non English - $18.80
Heavily Played Non English - $16.40
Damaged Non English - $11.70