Let me use a random country generator... Tonga?
So he is an acid elemental? A Toa of Acid?
First reaction while looking at the moc: OK this seems to be a decent WHAT ARE THOSE?!
What in the Tonga is happening with his feet? Why are they so blocky? And made out of system? And so out of texture, out of colour scheme, out of everything? I think that you tried to combine CCBS with system, but this is not how you make it. You don't take some lego bricks and force them into the feet, and then make the rest of the moc only out of CCBS pieces.
No, I mean really: the legs are just awful. The upper legs are basic HF upper legs, nothing wrong about it, but then you get to the lower legs and I am instantly bombed by a tornado of questions: why the weapon handles as heels? Why the blaster pieces as leg armour? Why did you even connected them like that? The said design choices could have been so good, but the end result looks a little out of place, especially compared to the rest of the build.
The torso is... meh. It's nice, and I see you tried to put some depth into it, but it ultimately ends up as pretty generic.
Same for the arms. I am honestly not a fan of bulking the lower arms. Those should be the lighter part of any natural arm. Tho this might be just me.
Why doesn't he have an eye piece?
Also why did you chose an Inika head as the handle? It looks weird compared to the rest of the sword.
This moc is pretty meh-to-bad because of those weird feet and sword handle. It's just... bad building choices. Try to remake it changing these two bits and then it should be better. At least in my eyes. And also try to focus on two or three colours. This moc has black, gunmetal, dark grey, light grey, lime green, trans green and white. Too many colours for a moc that simple.