Cheapest priced copy (Avacyn Restored): $0.35 at Card Kingdom, near mint, their price list as of .
Natural End 
Instant · Common · Core Set 2020 · #183
Destroy target artifact or enchantment. You gain 3 life.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avacyn Restored | 185 | Common | $0.35 | $0.49 |
| Core Set 2020 | 183 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 12 July 2019If the target artifact or enchantment is an illegal target by the time Natural End tries to resolve, the spell doesn’t resolve. You don’t gain life. If the target is legal but not destroyed (most likely because it has indestructible), you do gain life.