The Farthawey, Star Prophet

Flying, First Strike
When The Farthawey, Star Prophet enters the battlefield, you may view the top 7 cards of your enemies deck. You may choose to either exile those cards, or swap them with your hand and shuffle.
{t}{x}{x}{x}{x}: reduce your enemies hand size by {x}. If this ability would make their maximum hand size 1 or less, reduce it to 2 instead.
If The Farthawey, Star Prophet would be exiled, instead return it to your hand and double its casting cost.