Living Extinction

Living Extinction is Black and can only be played from your graveyard.
Each player exiles all creature cards from his or her graveyard, then sacrifices all creatures he or she controls, then puts all cards he or she exiled this way onto the battlefield.
Swampcycling {2}({2}, Discard this card: Search your library for a Swamp card, reveal it, and put it into your hand. Then shuffle your library.)
Flashback {3}{b}{b}{b}(You may cast this card from your graveyard for its flashback cost. Then exi