Cheapest priced copy (Duel Decks: Elves vs. Inventors): $0.35 at Card Kingdom, near mint, their price list as of .
Artificer's Epiphany 
Instant · Common · Magic Origins · #45
Draw two cards. If you control no artifacts, discard a card.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Elves vs. Inventors | 36 | Common | $0.35 | — |
| Jumpstart 2022 | 272 | Common | $0.35 | — |
| Magic Origins | 45 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 22 June 2015If you control at least one artifact as Artificer’s Epiphany resolves, you can’t discard a card, even if you want to.