Tetrachromancticon

Cast Tetrachromancticon using four different colors of mana.
When this artifact enters the battlefield, destroy all nonartifact, noncreature, nonland permanents that are three or fewer colors.
Lands you control have "{t}: Add one mana of any color."
Creatures with three or fewer colors get -2/-2 and lose indestructible.
Creatures with four or more colors get +4/+4 and gain indestructible.