Malody of the Multiverse

+4: Put a waste counter on 2 target lands, they become snowcovered wastes. Add X mana of any color. X is the number of waste counters on permanents.
-6: Exile up to X nonland permanents with CMC X or less. X is the amount of waste counters on permanents.
-20: Split Second - Search every library, hand, graveyard and exile for any amount of legendary permanents. Cast them without paying their mana costs.