Flying Whenever Aven Courier attacks, choose a counter on a permanent you control. Put a counter of that kind on target permanent you control if it doesn't have a counter of that kind on it.
NM-Mint - $5.10
Lightly Played - $4.80
Moderately Played - $4.60
Heavily Played - $4.10
Damaged - $3.30
NM-Mint Non English - $5.10
Lightly Played Non English - $4.80
Moderately Played Non English - $4.60
Heavily Played Non English - $4.10
Damaged Non English - $3.30