Lgeth'aryth, the Conquerer

If you would cause another player to lose
the game, you may cast this spell without paying
its mana cost. (You still pay any additional costs)
When you cast this spell, create a 6/6 blue, red,
and green Mutant creature token.
Mounted (This creature cannot be blocked except by
three or more creatures or other creatures with
Mounted)
At the end of each combat, for each mutant you
control, put a +1/+1 counter on it for each
creature it has destroyed this combat.