just wondering can i use bits of current element cards
As asymmetry said; reference using is fine. Directly copying it into a final product is not.
I'd really like to go in-depth on everyone's work so far, but real life isn't very forgiving right now. I'll give everyone a short statement to work with, though; I hope it's alright. Please mention it if you feel you need more help!
wizelsnarf: Not quite there. I'd do a paintover, but time is lacking; I'd strongly suggest using a photoreference such as this one
to check your lighting. Don't be afraid to screw things up, just use a new layer and experiment!
asymmetry: Great progress shots, and a good job so far. For depth, the simplest solutions can work: Try extending the forward part of it to overlap a little.
Kael: Great start, quite intriguing. Keep at it, but don't focus too much on keeping your lines clean. You're still in a sketch phase!
Krava: Still a bit careful with the perspective and movement lines there. I'd highly suggest just making 10 sketches of the creature, all with different poses or angles. I think there's a lot more to gain here, compositionally!
bored_ninja777: Try letting the shadow sit a little below the figure for a floating effect. I'd also highly recommend you to do the same as Krava; experiment!
Finally, let me make one thing clear: If I write a critique to someone else, chances are the same applies to your work. Any techniques or exercises I have mentioned in this thread, will be helpful to you. And if you're afraid of the workload, you could be in trouble: Lesson 2 is promising to become about 5 times as big..