Infinity Gauntlet

X is equal to the amount of lands you control.
If all six infinity stones are on your battlefield
you may tap enchanted creature and pay
{w}{u}{b}{r}{g}. Exile half of all permanents in play
at random. Exile enchanted creature unless it is
named Thanos, Mad Titan.
"Look. Pretty, isn't it? Perfectly balanced.
As all things should be." -Thanos