Dragon tamer concepts

So there are some concepts I have created before choosing one for sculpting. I was on for making 3 of them more detailed (I have chosen from that little sketches), I tried different techniques. After that I picked out the third one and started sculpting, the sculpt you can see there:
https://www.artstation.com/artwork/Dxo31n

Based on the Song of the Nibelungs, an epic poem.