Mynne, Bringer of Dreams

Flying, Menace, Ward - Mill seven cards.
When Mynne, Bringer of Dreams enters the battlefield, each oponnent exile cards from top
of their decks equal to the total number of cards
in all players' hands, then you choose a type card.
You may play cards from chosed type, and
pay mana of any color to cast these cards, until
Mynne, Bringer of Dreams leaves the battlefield.