Cheapest priced copy (Battlebond): $0.35 at Card Kingdom, near mint, their price list as of .
Slum Reaper 
Creature — Horror · 4/2 · Common · Ultimate Masters · #114
When this creature enters, each player sacrifices a creature of their choice.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battlebond | 160 | Uncommon | $0.35 | $0.49 |
| GRN Guild Kit | 52 | Uncommon | $0.35 | — |
| Return to Ravnica | 77 | Uncommon | $0.35 | $0.49 |
| Ultimate Masters | 114 | Common | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 7 December 2018If any player controls no creatures, that player simply doesn’t sacrifice anything. Each other player still sacrifices a creature.
- 7 December 2018As Slum Reaper’s ability resolves, first the player whose turn it is chooses a creature they control, then each other player in turn order does the same, knowing the choices made before them. Then all the chosen creatures are sacrificed at the same time.
- 7 December 2018Slum Reaper may be the creature its controller sacrifices for its own ability.