Seems a bit OP to me. This would allow first turn fractalling to be possible (Aether Tower + Implode = 8 Aether Quanta), which is not necessarily game breaking, but would turn many games into a coin-toss on who's opening hand is the best, regardless of how the rest of your deck is.
I dunno, I might just be paranoid about cards comboing with fractal..
Edit: Think about this: ball lightning, 2x fractal, 2x aether tower, 2x implode as an opening hand. Thats like 70 damage on turn 1.