Compared to when this card first released, there are now many methods and options for destroying troublesome cards
9 Liliana Vess Liliana Vess comes from the Duel Decks Anthology, Garruk vs
2 Moraug, Fury of Akoum Never Stop Attacking Speaking of attacks, Moraug loves to attack even more than Karlach does
So instead of using your burn to attack your opponent directly, instead use it to kill their deathtouch creatures
Finally, once you have established absolute control with this massive value, the deck features win conditions including flooding the battlefield with a multitude of artifacts, including powerful creatures like Master of Etherium, Metalworker Colossus, Myr Battlesphere, artifact tokens from Thopter Spy Network, massive constructs created with Urza, and more
In terms of power level, I think it is somewhat playable enough