Cheapest priced copy (Tales of Middle-earth Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Gwaihir, Greatest of the Eagles 
Legendary Creature — Bird Noble · 5/5 · Rare · Tales of Middle-earth Commander · #417
Flying
Whenever Gwaihir attacks, target attacking creature gains flying until end of turn.
At the beginning of each end step, if you gained 3 or more life this turn, create a 3/3 white Bird creature token with flying and "Whenever this token attacks, target attacking creature gains flying until end of turn."
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.49 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tales of Middle-earth Commander | 15 | Rare | $0.49 | — |
| Tales of Middle-earth Commander | 99 | Rare | $2.29 | — |
| Tales of Middle-earth Commander | 417 | Rare | $4.99 | $4.49 |
3 rulings from Wizards of the Coast
- 16 June 2023Gwaihir, Greatest of the Eagles's ability looks at how much life you've gained in the turn, even if it wasn't on the battlefield when you gained life. It doesn't care if you also lost life, even if you lost more life than you gained.
- 16 June 2023You create just one Bird token, no matter how much life you've gained past 3 life.
- 16 June 2023If you haven't gained 3 or more life by the time an end step begins, Gwaihir, Greatest of the Eagles's ability won't trigger at all.