Pretty cool design, but could use some tweaks, anatomically. The legs stand out the most to me, as they look like shins attached to the body. where are the knees? Also, the way they connect to the body seems off; like there is no joint at the hip. Some kind of chest/pectoral... form... thingy might be nice as well. I understand that you were probably going for a snaky design, but the arms/wings/etc couldn't function without some kind of muscle structure in that area. Doesn't have to be anything big or bulky, and hell, it could even be a fun experiment trying to design a chest slim/small enough to work while maintaining the original design.
Love the fire as spikes, btw. Good stuff.