Okay. I thought it was yellow. But black is a good and unusual choice.
I based the enemy on the game Will Rock. Just type this into a search engine: Will Rock Cyclop boss. In fact, the differences are significant. But I suggest the simplest option for creating a boss enemy. Moreover, according to the meaning of my mappack, I need an enemy that will have weaker versions in future levels. Biomechanoid fits this role.
As for when I need it? Whatever is more convenient for you. If it's in the next update, I'll start working on the boss fight right away. If it's later, I'll be busy polishing up other things.