Misgoverned Bathrobe Element
The linework is great, a cyborg hydra ticks all the right boxes for me!
I think your painting is a bit ambitious, however. You've got a few regions of different colours (red, grey, blue and purple), which don't work together as a whole. Keep your colour scheme simple, and let your linework do the talking.
You've also got some blotchy spots of shading on the hydra, which looks clumsy compared to the details in the linework. Also I feel your castle is a bit impoverished of attention compared to the hydra, and whatever it's seated on looks more like a planet than a hill.
Hydra rarrarararar