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 - $9.10
Lightly Played - $7.30
Moderately Played - $6.40
Heavily Played - $5.50
Damaged - $4.60
Near Mint Spanish - $9.10
Lightly Played Spanish - $7.30
Moderately Played Spanish - $6.40
Heavily Played Spanish - $5.50
Damaged Spanish - $4.60