Cheapest priced copy (Bloomburrow Commander): $0.35 at Card Kingdom, near mint, their price list as of .
Rowdy Research 
Instant · Uncommon · Wilds of Eldraine · #312
This spell costs {1} less to cast for each creature that attacked this turn.
Draw three cards.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Bloomburrow Commander | 173 | Uncommon | $0.35 | — |
| Wilds of Eldraine | 312 | Uncommon | $0.35 | $0.49 |