Cheapest priced copy (Duel Decks: Jace vs. Vraska): $0.35 at Card Kingdom, near mint, their price list as of .
Shadow Alley Denizen 
Creature — Vampire Rogue · 1/1 · Common · Duel Decks: Jace vs. Vraska · #44
Whenever another black creature you control enters, target creature gains intimidate until end of turn. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Jace vs. Vraska | 44 | Common | $0.35 | — |
| Gatecrash | 76 | Common | $0.35 | $0.99 |
| Ravnica Remastered | 92 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 24 January 2013The black creature that entered can be chosen as the target of Shadow Alley Denizen's ability, but it won't be able to attack that turn unless it also has haste.
- 24 January 2013Shadow Alley Denizen can be chosen as the target of its own ability.