"Rixehnn is what some would call 'bad-to-the-bone'. Even as a matoran he would cause what he would put as mischief but usually ended up with a fire somewhere and either badly injured or missing matoran. It didn't help that he later mutated into a larger form that could could cause even more untold harm and rival that of Toa.
His body became lean and agile whiles also retaining great durability to soak up almost ridiculous amounts of punishment. This was due to his mask which changed to reflect his nature. As a matoran he wore a sleek, rounded mask that was an image of innocence, but after his transformation, it became elongated and grew large spiked teeth at the front. His masks new ability allowed his mental strength to reflect into physical power. This meant that the more he wanted to wanted to cause harm, soak up punishment or dish it out himself, reflected his power levels. This also fuelled his shoulder mounted cannon, an invention of his own integrated into his body. It was light, motion tracked with his own eyes as targeting systems and could be charged up to devastating effect."
So I haven't really made any Bionicle/Technic mocs for a while and this was just a quick build to use that Kirop mask somehow. I've used the lime/black version before a few times but never this one.
Also to note I rarely actually make villainous characters any more. They're either Heroes or Bounty Hunters and my personal favourite, Anti-Toa, but rarely complete villains.