Cheapest priced copy (Zendikar): $0.35 at Card Kingdom, near mint, their price list as of .
Seascape Aerialist 
Creature — Merfolk Wizard Ally · 2/3 · Uncommon · Zendikar · #64
Whenever this creature or another Ally you control enters, you may have Ally creatures you control gain flying until end of turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Zendikar | 64 | Uncommon | $0.35 | $0.99 |
One ruling from Wizards of the Coast
- 1 October 2009The ability affects only Allies you control at the time the ability resolves.