Rulings

• Misthollow Griffin can also be cast from a player's hand.2012-05-01
• Misthollow Griffin doesn't have an ability that exiles itself. Some other effect will be needed to get the card into exile.2012-05-01
• You must still pay Misthollow Griffin's mana cost when you cast it from exile.2012-05-01
• Misthollow 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.2012-05-01