Chromatic Anihilator

Sunburst (This enters the battlefield with a +1/+1
counter on it for each color of mana spent to cast it.)
Chromatic Anihilator has anihilator X, where X
is the number of +1/+1 counters on Chromatic
Anihilator. (Whenever this creature attacks,
defending player sacrifices X permanents.)
Created from a shard of the world's core, it now exist
only to destroy what's left of it.