Cheapest priced copy (New Capenna Commander): $3.99 at Card Kingdom, near mint, their price list as of .
Aven Courier 
Creature — Bird Advisor · 1/1 · Rare · New Capenna Commander · #22
Flying
Whenever this creature 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.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $3.99 to $9.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Capenna Commander | 22 | Rare | $3.99 | — |
| New Capenna Commander | 123 | Rare | $4.49 | — |
| New Capenna Commander Promos | 22p | Rare | — | $9.99 |
One ruling from Wizards of the Coast
- 29 April 2022You choose the target permanent to put a counter on as you put the triggered ability of Aven Courier on the stack. You choose the kind of counter from a permanent as that ability resolves.