Thanos, The Mad Titan

{w}{u}{b}{r}{g}: For each type of permanent, each
player chooses half of those permanents they
own. Exile those permanents. Then each player
exiles half of their library rounded up. Until end
of turn you may cast spells exiled this way as
though they were cast with mana of any color.
At the beginning of your upkeep return all cards
in exile to the battlefield under their owner's
control then exile Thanos. At the beginning
of your next end step you lose the game.
"You should have aimed for the