Daimian, the Cataclysm

Flying, Trample, Indestructible, Hexproof
Apocalyptic Quill – Whenever Daimian Monarch, the Cataclysm attacks, exile the top X cards of each player's library, where X is the number of cards in your graveyard. You may play any number of them without paying their mana costs.
End of All Things – When Daimian Monarch, the Cataclysm enters the battlefield, destroy all other creatures, planeswalkers, artifacts, and lands. Each opponent discards their hand and mills ten cards.
Eternal Rewrite – I