Cheapest priced copy (Final Fantasy Commander): $0.99 at Card Kingdom, near mint, their price list as of .
Archfiend of Depravity 
Creature — Demon · 5/4 · Rare · Fate Reforged · #62
Flying
At the beginning of each opponent's end step, that player chooses up to two creatures they control, then sacrifices the rest.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $0.99 to $6.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Archenemy: Nicol Bolas | 31 | Rare | $1.99 | — |
| Final Fantasy Commander | 273 | Rare | $0.99 | $3.49 |
| Fate Reforged | 62 | Rare | $1.29 | $4.99Out of stock |
| Fate Reforged Promos | 62 | Rare | — | $6.49 |
| Fate Reforged Promos | 62s | Rare | — | $4.99 |
| Starter Commander Decks | 67 | Rare | $1.29 | — |
2 rulings from Wizards of the Coast
- 24 November 2014The opponent chooses which creatures to spare, if any, as the ability resolves. This choice doesn't target the creatures.
- 24 November 2014The opponent may choose to spare one or no creatures. If the player doesn't choose any creatures, they will sacrifice all creatures they control.