Cheapest priced copy (Magic 2010): $1.99 at Card Kingdom, near mint, their price list as of .
Mirror of Fate 
Artifact · Rare · Magic 2010 · #215
{T}, Sacrifice this artifact: Choose up to seven face-up exiled cards you own. Exile all the cards from your library, then put the chosen cards on top of your library.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $1.99 to $9.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Magic 2010 | 215 | Rare | $1.99 | $9.99 |
3 rulings from Wizards of the Coast
- 1 October 2009You don’t choose the exiled cards until Mirror of Fate’s ability resolves. It doesn’t matter how they wound up in the exile zone.
- 1 October 2009Exiled cards are face up by default; they’re face down only if the effect that exiled them said so. For example, the cards from your library that Mirror of Fate exiles are exiled face up.
- 1 October 2009You choose the order that the chosen cards are put on top of your library. You don’t have to show anyone else that order.