The Blood In Darkness

Each player loses halve their life, rounded up, and discards their hand. Remove all creatures from the game.
Rebound. (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)
When this spell is rebounded, players exile halve of their library, rounded up, at random, then search your grave, library, hand and exile for Misty blood and put it onto the battlefield.