Runa The Spell Master

Haste, Hexproof
When Runa The Spell Master enters the battlefield exile the top 5 cards of your library. All instants and sorcerys exiled by this ability can be cast for free then shuffled back into your deck.
When Runa The Spell Master Leaves the battle field discard your hand. All Instants and Sorcerys discarded this way can be cast from your graveyard at anytime.