More effects and realistic gestures. Kinda feels bumpy on top and incomplete. I know Naga but that doesn't seem to be a bit like a fusion. Effects- some things that could help him stand out more but never mind, it's not necessary.
the second looks really impressive
dont like its face much but still cool.. other suggestion.. make a new shape for on'm (the yellow circle things with the dot in them).. when most things evolve, designs on the creatures alter ever so slightly and rarely stay the same..
To avoid bumpyness, you see lines that make a 90 degree angle and that makes it look pretty bad.
Second: The tail is a little fused with the body and you might wanna fix it.
i think it should have a bit of a neck... at the moment, it's head looks really squished into it's body. it's good though, this would make an awesome evo! maybe you should make a nagini version too, for male and female?