Just beat the Heart with such a dumb deck.
I had Mummified Hand (whenever you play a Power, a random card in your hand costs 0), tons of 0 cost cards, Runic Pyramid (no longer discard your hand) and Kunai (+ dex for every 3 attacks) and Runic Capacitor (+3 orb slots).
+ a bunch of rando powers.
Mostly you craft your hand so that when you play a power, Meteor Strike is your only non-0 card. Get it online. With Runic Pyramid you can hold any excess block cards you have. Then you open every turn with a full 10 card hand, 8+ energy and go to town. By the end of the fight my Steam Barriers were blocking for 20. Most of the difficulty of the deck is figuring out how to clear your crappy cards from your hand so that they don't get stuck there from Runic Pyramid.