Cheapest priced copy (Forgotten Realms Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Fiend of the Shadows 
Creature — Vampire Wizard · 3/3 · Rare · Dark Ascension · #62
Flying
Whenever this creature deals combat damage to a player, that player exiles a card from their hand. You may play that card for as long as it remains exiled.
Sacrifice a Human: Regenerate this creature.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 99 | Rare | $0.49 | — |
| Dark Ascension | 62 | Rare | $0.49 | $0.49 |
4 rulings from Wizards of the Coast
- 22 January 2011Playing a card exiled with Fiend of the Shadows follows all the normal rules for playing that card. You must pay its costs, and you must follow all timing restrictions, for example.
- 22 January 2011As long as the card remains exiled, you may still play it, even if Fiend of the Shadows leaves the battlefield or changes controllers.
- 22 January 2011If this creature deals combat damage to multiple players simultaneously, perhaps because some combat damage was redirected, its ability will trigger for each of those players.
- 22 January 2011You may only play the card, meaning play it as a land or cast it as a spell. It's not in your hand. You can't discard it, activate its cycling abilities, and so on.