Hello, welcome to Pixelation
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Yes, what exactly is going on in this piece? My guess is theres a huge structure floating in the background, and sword planted in the ground infront of the viewer. A tip: when posting something, go into a little detail about what it is you want from the piece, the direction you want to take it, what lead you to do it, etc. Insights like this can really help critique.
This is a complicated subject to try and render. Lots of subtle curves, and what appears to be a shiny surface, combined with extreme scale differences and perspective. Just noting it.
Generally the rendering is arbitrary. The sword isn't too bad, but the garden structure is overrun with pillow shading. Try breaking it down into 3-dimensional primitives like boxes, cones, cylinders and spheres, pick where your light source is and then block in the shading. Since it appears to be shiny, you'll need to decide what kind of environment its in, since the shiny parts will be reflecting that.
Isolate the area where the sword overlaps the garden, so its clearer to make out the sword. Aerial perspective could help you with this.
In fact, I suggest being more drastic with your decision on the subject of the piece. Is the focus the sword, or the garden? What relevance is the sword to the garden? What relevance is the garden to the sword? If you want both, I'd think about rearranging the composition so each element has is own space to breathe and interact. I'm thinking of the garden on one side of the image, and the sword on the other:
Pixel-wise, lots of jaggies happening with the outline. You've got a lot of broken lines, with highlight broken by dark shadow, or vice-versa. It's really destroying the idea of a curvy, elegant structure.
Palette is good, I like it