Tivalune, Lord of the Astral

Flying, Hexproof
When Tivalune, Lord of the Astral enters the battlefield, exile each creature with flying you don't control until Tivalune leaves the battlefield.
Whenever Tivalune, Lord of the Astral attacks, draw a card for each creature with flying you control.
Other creatures with flying you control get +1/+1
He will let no other creatures travel his skies. His very presence causes the sky to bend to his will.