Cheapest priced copy (Innistrad: Double Feature): $0.35 at Card Kingdom, near mint, their price list as of .
Stromkirk Bloodthief 
Creature — Vampire Rogue · 2/2 · Uncommon · Foundations · #185
At the beginning of your end step, if an opponent lost life this turn, put a +1/+1 counter on target Vampire you control.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad: Double Feature | 123 | Uncommon | $0.35 | $1.99 |
| Foundations | 185 | Uncommon | $0.35 | $0.49 |
| Innistrad: Midnight Hunt | 123 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 24 September 2021Stromkirk Bloodthief's ability cares whether an opponent lost life this turn, not how their life total changed. For example, an opponent who gained 2 life and lost 1 life in the same turn still lost life.