Cheapest priced copy (Throne of Eldraine): $0.35 at Card Kingdom, near mint, their price list as of .
Epic Downfall 
Sorcery · Uncommon · Avatar: The Last Airbender · #96
Exile target creature with mana value 3 or greater.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Throne of Eldraine | 85 | Uncommon | $0.35 | $0.49 |
| The List | ELD-85 | Uncommon | $0.35 | — |
| Avatar: The Last Airbender | 96 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 4 October 2019If a creature on the battlefield has {X} in its mana cost, X is considered to be 0.
- 2 October 2025If a creature on the battlefield has {X} in its mana cost, X is considered to be 0.