Cheapest priced copy (Dark Ascension): $0.35 at Card Kingdom, near mint, their price list as of .
Falkenrath Torturer 
Creature — Vampire · 2/1 · Common · Dark Ascension · #60
Sacrifice a creature: This creature gains flying until end of turn. If the sacrificed creature was a Human, put a +1/+1 counter on this creature.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dark Ascension | 60 | Common | $0.35 | $0.49 |
| Innistrad Remastered | 109 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 22 January 2011You can sacrifice Falkenrath Torturer itself to activate its ability.
- 22 January 2011The ability checks whether the sacrificed creature as it last existed on the battlefield was a Human. (It doesn’t matter what its creature types are in the graveyard.)