I don't see how this would help you with your own creatures. You would already have to have the quanta to play them before you could target. If you played it on enemy creatures it would be an improvement...
Fade away sounds like they should be in a shadow with 50% chance of not being targetable or something.
How about if it could reduce attack by 50% on each use (down to 1)? Growth creatures would get nullfied by that... or take the new gargoyle, 7/23 makes it hard to kill. Antimatter might work but other than that not much you could do. If you faded its attack by 50% it would be down to 1 in 3 turns (assuming rounding up, 7>4>2>1)