Cheapest priced copy (Commander 2014): $1.29 at Card Kingdom, near mint, their price list as of .
Hallowed Spiritkeeper 
Creature — Avatar · 3/2 · Rare · Crimson Vow Commander · #88
Vigilance
When this creature dies, create X 1/1 white Spirit creature tokens with flying, where X is the number of creature cards in your graveyard.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $1.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2014 | 8 | Rare | $1.29 | — |
| Crimson Vow Commander | 88 | Rare | $1.29 | — |
One ruling from Wizards of the Coast
- 7 November 2014Count the number of creature cards in your graveyard as the triggered ability resolves, including Hallowed Spiritkeeper itself if it's still there, to determine how many Spirits are created.