Argent Hellkite

Creature - Dragon
Flying, haste
Whenever Argent Hellkite attacks, destroy target nonartifact permanent.
Whenever a nonartifact permanent an opponent controls is put into a graveyard from the battlefield, put a +1/+1 counter on Argent Hellkite.
4/4
The armor gifted by Mirrodin's creator is not limited to smaller denizens of the world. These four brothers war endlessly with Skithiryx, who was once their youngest sibling, over a homeland long since corrupted beyond recognition.Nice piece of art! When I first saw it, I thought "Armored Dragon". From there, I decided to tie it in with Argentum Armor. I liken this to Angel of Despair, trading dependency on the attack step and limited targeting for a purely colorless mana cost and a faster clock.
The ability to nuke a land per turn, even given through chump blockers, is balanced against his high cost. This should shift him from generating potential early blowouts (ie. Braids) to instead providing inevitability.
I especially like the that third ability is in direct opposition with Infect, and allude to that in the flavor text. Whereas most creatures would succumb in a war of attrition with Skithiryx, these dragons are immune to his blight. On the other hand, they are unable to overcome his regeneration, hence the ceaseless back-and-forth battle. Sadly, I suspect that the flavor text would have to be truncated to fit on a card.