Cheapest priced copy (Conspiracy: Take the Crown): $0.35 at Card Kingdom, near mint, their price list as of .
Blood-Toll Harpy 
Creature — Harpy · 2/1 · Common · Theros · #79
Flying
When this creature enters, each player loses 1 life.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conspiracy: Take the Crown | 129 | Common | $0.35 | $0.49 |
| Theros | 79 | Common | $0.35 | $0.49 |