Hearthstone cardback fanart - Halloween

AdrienMTZ

Hi everyone, I'd like to share and get some C&C on this project I started a few days ago.
This would be my second cardback fanart (first can be seen here https://www.artstation.com/artwork/ng0WO)

I have rough sketches at this point and I would realy apreciate any advice to make it better, I feel like i'm a bit lost at this point .. 
Thanks in advance

RN

I think going with any of the three on the middle would be a cool choice. 

The first one from the left feels lacking in comparison to the others, they have those orange accents that make them more interesting.