Cheapest priced copy (Avacyn Restored): $1.49 at Card Kingdom, near mint, their price list as of .
Misthollow Griffin 
Creature — Griffin · 3/3 · Mythic · Avacyn Restored · #68
Flying
You may cast this card from exile.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $1.49 to $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avacyn Restored | 68 | Mythic | $1.49 | $14.99 |
| The List | AVR-68 | Mythic | — | $2.29 |
4 rulings from Wizards of the Coast
- 1 May 2012Misthollow Griffin's ability doesn't change when you can cast creature spells: when you have priority during your main phase when the stack is empty.
- 1 May 2012You must still pay Misthollow Griffin's mana cost when you cast it from exile.
- 1 May 2012Misthollow Griffin doesn't have an ability that exiles itself. Some other effect will be needed to get the card into exile.
- 1 May 2012Misthollow Griffin can also be cast from a player's hand.