Entropic Breakdown

At the beginning of each player's upkeep, that player rolls a six-sided die, then applies the result:
1: Choose two colors at random. Destroy all permanents that are at least one of those colors.
2-3: Each player puts the top X cards of his or her library into his or her graveyard, where X is the result.
4-5: Each player sacrifices two creatures and discards three cards.
6: Exile all permanents. Each player loses 5 life.