Cheapest priced copy (Time Spiral): $0.35 at Card Kingdom, near mint, their price list as of .
Faceless Devourer 
Creature — Nightmare Horror · 2/1 · Uncommon · Time Spiral · #108
Shadow (This creature can block or be blocked by only creatures with shadow.)
When this creature enters, exile another target creature with shadow.
When this creature leaves the battlefield, return the exiled card to the battlefield under its owner's control.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Time Spiral | 108 | Uncommon | $0.35 | $0.49 |
| Time Spiral Remastered | 115 | Uncommon | $0.35 | $0.49 |
7 rulings from Wizards of the Coast
- 19 March 2021Auras attached to the exiled creature will be put into their owners' graveyards. Equipment attached to the exiled creature will become unattached and remain on the battlefield. Any counters on the exiled creature will cease to exist. Once the exiled creature returns, it's considered a new object with no relation to the object that it was.
- 19 March 2021If a token is exiled this way, it will cease to exist and won't return to the battlefield.
- 19 March 2021Three Faceless Devourers entering the battlefield at separate times with no other creatures with shadow on the battlefield will result in an infinite loop. The game ends in a draw unless a player somehow interrupts the loop.
- 19 March 2021If Faceless Devourer leaves the battlefield before its first triggered ability has resolved, its last ability triggers. This ability does nothing when it resolves. Then its first ability resolves and exiles the target creature indefinitely.
- 19 March 2021Once a creature has been blocked, that creature remains blocked and will deal and be dealt combat damage even if it gains or loses shadow or if the blocking creature gains or loses shadow.
- 19 March 2021If an attacking creature has multiple evasion abilities, such as shadow and flying, a creature can block it only if that creature satisfies all of the appropriate evasion abilities.
- 19 March 2021Multiple instances of shadow on the same creature are redundant.