Cheapest priced copy (Commander 2013): $0.35 at Card Kingdom, near mint, their price list as of .
Aerie Mystics 
Creature — Bird Wizard · 3/3 · Uncommon · Conflux · #1
Flying
{1}{G}{U}: Creatures you control gain shroud until end of turn. (They can't be the targets of spells or abilities.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2013 | 2 | Uncommon | $0.35 | — |
| Commander Anthology | 1 | Uncommon | $0.35 | — |
| Conflux | 1 | Uncommon | $0.35 | $0.49 |