...more thematic than practical.
The thing is that ALL of the "regular" FG decks are thematic- to the point of being way less effective than they would be otherwise. Imagine Incarnate with a few devourers/steals/drain lifes. Or rainbow with half the hourglasses! Fire Queen with explosions.
Incarnate with steals and drain lifes would still be weak. Devourers though may or may not absolutely f*** over a rainbow.
As for thematic decks, they are all pretty optimized as it stands. Rainbow with half the hourglasses would be
far easier (I run both pulverizer and eternity in my deck, so I use the steals on the hourglasses to keep her/him from drawing too quickly and overwhelming me). Rainbow in fact becomes nigh-impossible if you allow the card draw to remain on the table for a while, because then you're plain boned.
Fire queen with destroys would also be pretty easy. Certainly no harder than Graviton.
While I haven't faced these FGs (I'm using a 45-card upgraded rainbow...basically the 43 card version with a miracle and pulv thrown in), here's the gist of it:
Quantum denial: there's already a FG for that. He's called Seism. If you wanted to make him impossible, just make his deck, throw out the steel golems and replace with electrum hourglasses. GG.
