Cheapest priced copy (Time Spiral): $0.49 at Card Kingdom, near mint, their price list as of .
Sengir Nosferatu 
Creature — Vampire · 4/4 · Rare · Time Spiral · #128
Flying
{1}{B}, Exile this creature: Create a 1/2 black Bat creature token with flying. It has "{1}{B}, Sacrifice this token: Return an exiled card named Sengir Nosferatu to the battlefield under its owner's control."
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Time Spiral | 128 | Rare | $0.49 | $0.99 |
| Time Spiral Remastered | 136 | Rare | $0.49 | $0.49 |
2 rulings from Wizards of the Coast
- 25 September 2006The Sengir Nosferatu that the Bat token's ability returns to the battlefield doesn't have to be the same one that created it, and it doesn't even have to be owned by the same player.
- 1 May 2007If the Nosferatu is copied (by Clone, for example) and then the copy is exiled by the first activated ability, it won't be able to come back using the second activated ability, since it's no longer named Sengir Nosferatu in the Exile zone.