Reality Implosion

Separate cards in players hands and graveyards into X piles at random, where X is equal to the number of players. Then, starting with you, each player selects one of those piles and exiles it. Players can cast cards they exiled this way.
Instant and sorcery spells can be cast without paying their mana costs for the rest of the game.
When you have five or more instant or sorcery cards in your graveyard you lose the game.