Cheapest priced copy (Core Set 2021): $0.35 at Card Kingdom, near mint, their price list as of .
Griffin Aerie 
Enchantment · Uncommon · Core Set 2021 · #22
At the beginning of your end step, if you gained 3 or more life this turn, create a 2/2 white Griffin creature token with flying.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2021 | 22 | Uncommon | $0.35 | $0.49 |
| The List | M21-22 | Uncommon | $0.39 | — |
| Wilds of Eldraine: Enchanting Tales | 5 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 23 June 2020If you haven't gained 3 life by the time your end step begins, Griffin Aerie's ability won't trigger at all.
- 23 June 2020You create just one Griffin token, no matter how much life you've gained past 3 life.
- 23 June 2020Griffin Aerie'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.