Cheapest priced copy (Final Fantasy): $0.35 at Card Kingdom, near mint, their price list as of .
Cloud of Darkness 
Legendary Creature — Avatar · 3/3 · Uncommon · Final Fantasy · #481
Flying
Particle Beam — When Cloud of Darkness enters, target creature an opponent controls gets -X/-X until end of turn, where X is the number of permanent cards in your graveyard.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.35 to $11.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy | 217 | Uncommon | $0.35 | $0.49 |
| Final Fantasy | 481 | Uncommon | $0.59 | $11.99 |
One ruling from Wizards of the Coast
- 6 June 2025The value of X is calculated only once, as Cloud of Darkness's last ability resolves.