Hympyrio, Lord of the wind

Flying, Menace, Hexproof
When Hympyrio, Lord of the wind enters the battlefield, sacrifice target creature you control and tap {x} creatures for {x} turns where {x} is the sum of the power and toughness of creature sacrificed.
When Hympyrio, Lord of the wind is blocked by any creature with flying, return that creature to its owner’s hand