Cheapest priced copy (Throne of Eldraine): $0.49 at Card Kingdom, near mint, their price list as of .
Doom Foretold 
Enchantment · Rare · Throne of Eldraine · #378
At the beginning of each player's upkeep, that player sacrifices a nonland, nontoken permanent of their choice. If that player can't, they discard a card, they lose 2 life, you draw a card, you gain 2 life, you create a 2/2 white Knight creature token with vigilance, then you sacrifice this enchantment.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Throne of Eldraine | 187 | Rare | $0.49 | $0.49 |
| Throne of Eldraine | 378 | Rare | $1.79 | $3.99 |
| Throne of Eldraine Promos | 187p | Rare | $0.49 | $0.49 |
| Throne of Eldraine Promos | 187s | Rare | — | $1.29 |
5 rulings from Wizards of the Coast
- 4 October 2019If Doom Foretold leaves the battlefield or changes control while its ability is on the stack, its effect still happens. You just won't be able to sacrifice it if instructed to do so.
- 4 October 2019If the player can sacrifice a nonland, nontoken permanent, that player must do so. They can't choose to rush toward their doom.
- 4 October 2019During your upkeep, you can sacrifice Doom Foretold for its own ability.
- 4 October 2019If the player is unable to sacrifice a permanent and is unable to discard a card, they still lose 2 life, and the rest of Doom Foretold's effects happen.
- 4 October 2019In a Two-Headed Giant game, Doom Foretold's ability triggers twice during a team's upkeep. In any order you'd like, each of those players has to sacrifice a permanent. The full consequences happen if that player can't, even if you sacrifice Doom Foretold as the first triggered ability is resolving.