Cheapest priced copy (The Lost Caverns of Ixalan): $0.35 at Card Kingdom, near mint, their price list as of .
Abyssal Gorestalker 
Creature — Horror · 6/6 · Uncommon · The Lost Caverns of Ixalan · #87
When this creature enters, each player sacrifices two creatures of their choice.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Lost Caverns of Ixalan | 87 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 10 November 2023As the enters-the-battlefield ability resolves, first the player whose turn it is chooses which two creatures they are going to sacrifice, then each other player in turn order does the same. Players will know the choices of previous players when making their choices. Then all creatures are sacrificed by their controllers simultaneously.
- 10 November 2023If a player controls only one creature as the ability resolves, they must sacrifice it.
- 10 November 2023You may sacrifice Abyssal Gorestalker to its own ability. If it is the only creature you control or one of two creatures you control, you must sacrifice it.