So, I have been working on monsters for the roguelike game that I am doing and this is one of the critters I've made -- the Floaterbot. I intend to switch out the energy and metal casing colors and a few of the appendages based upon how they have evolved throughout the game. The four designs from left to right represent the four stages of "evolution" that the game may show depending on how much you've been killing them. Kill too many, and the next, hardier form will show up to make you regret it.