Cheapest priced copy (Weatherlight): $0.35 at Card Kingdom, near mint, their price list as of .
Abyssal Gatekeeper 
Creature — Horror · 1/1 · Common · Weatherlight · #59
When this creature dies, each player sacrifices a creature of their choice.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $0.35 to $2.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Divine vs. Demonic | 31 | Common | $0.49 | — |
| Duel Decks Anthology: Divine vs. Demonic | 31 | Common | $2.29 | — |
| Weatherlight | 59 | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 4 October 2004The "sacrifice a creature" effect is not targeted. It can affect creatures with protection from black, for example.
- 1 April 2008The player whose turn it is chooses a creature to sacrifice, then each other player in turn order chooses a creature to sacrifice, then all chosen creatures are sacrificed at the same time.