Settle Amid Toxins

The first four mana that would be added to
each player's mana pool each turn becomes
colorless.
If a player would lose unspent colorless mana,
creatures that player controls get -1/-1 until
end of turn for each one mana lost this way.
Skip your draw step.
Exile the top ten cards of your library: Draw
a card, lose 10 life, and add {w}{w}{b}{b}.