I can tell you right now that this concept has been done many, many times before, however I can also tell you that I have not seen it done this way before.
First: Your deck looks huge. With 46 cards and only three Fractals, the odds of you drawing one (a key cog to your deck) before your opponent outdistances your ability to deprive them of quanta is not good at all. Also, and I'm not quite sure how you did it, but you seem to have gotten seven copies of Drain Life into your deck image. Even with assuming that you intended to have six, rather than seven, that still puts you at 45 cards, which is too much.
Second: Your mark isn't doing nearly enough for your deck. Yes, I fully understand that you want to be able to protect your devourers, but at the same time your mark should be powering the most vital parts of your deck, since it can never be destroyed. In your case, I would most likely change it to
.
Third: Your strategy looks to be spread too thin. Are you a rush? Are you a stall? While you should have lots of
quanta due to your devourers, Drain Life is simply not the most effective way to use that quanta. If you are concerned about lack of healing, I would suggest subbing out your dragons (all 6) for Minor Vampires. If you want bigger hitters, I would recommend Gargoyles. Hell, you could even go 3 and 3 if you wanted, and utilize whichever the particular game dictates. Point is, with Fractal, all you need is one copy of a creature out in order to have an army at your beck and call.
With all that being said, if
I would design your deck would be this:
5uk 5uk 5uk 5uk 5uk 5uk 5uk 5um 5um 5um 5um 5um 5um 5ut 5ut 5ut 5uv 5uv 5uv 61o 61o 61o 61o 61o 61o 61o 622 622 622 622
At the end of the day, though, it's your deck. Play with it, make it fit
you and have fun with it. That is far and away the most important advice I can give you.