Sight of the Awoken

Target opponent separates his or her hand into
two piles, and then reveals one of those piles. You choose one of those piles. Exile all of the cards in that pile. You may play cards exiled this way for
as long as they remain exiled and you may spend mana as though it were mana of any type to cast those cards.
The Awoken spreads its Nightmare across the whole of Belenon, and will do with reality what it wishes.