Remaining Darkness Towers

Hi guys. Just wanted to get some feedback from the remaining darkness tower's winners. If you guys have any suggestions for the artwork please leave it here. I will probably get started on these in the next couple days. The Ripper by syotos 
Imp Mines by andy p. 
Abyss Walker by ManuWins 

I thought mine as a knight enveloped by a dark aura. If it could be any help I find the inspiration from: well, looking forward to your amazing arts guys. :)