Gustha's Scepter [Alliances]

T: Exile a card from your hand face down. You may look at it for as long as it remains exiled.
T: Return a card you own exiled with Gustha's Scepter to your hand.
When you lose control of Gustha's Scepter, put all cards exiled with Gustha's Scepter into their owner's graveyard.