Cheapest priced copy (Duel Decks: Elves vs. Inventors): $7.49 at Card Kingdom, near mint, their price list as of .
Regal Force 
Creature — Elemental · 5/5 · Rare · Eternal Masters · #181
When this creature enters, draw a card for each green creature you control.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $7.49 to $39.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Elves vs. Inventors | 22 | Rare | $7.49 | — |
| Eternal Masters | 181 | Rare | $7.49 | $12.99 |
| Eventide | 74 | Rare | $9.49 | $39.99Out of stock |
| Special Guests | 141 | Mythic | $8.49 | $7.99 |
One ruling from Wizards of the Coast
- 8 June 2016If Regal Force is still on the battlefield as its triggered ability resolves, its ability will count itself.