Deathwing, The Worldbreaker

Flying, indestructible, trample
When Deathwing, The Worldbreaker enters the battlefield, exile all graveyards.
Cataclysm: Whenever a dragon enters the battlefield, each player sacrifices all lands he or she controls other than Mountains.
"Life is weak! Mortal! Fleeting! Fragile! Death is final, death is eternal, death... is my realm."