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 - $4.10
Lightly Played - $3.90
Moderately Played - $3.70
Heavily Played - $3.30
Damaged - $2.70
NM-Mint Non English - $4.10
Lightly Played Non English - $3.90
Moderately Played Non English - $3.70
Heavily Played Non English - $3.30
Damaged Non English - $2.70