This is to replace the drowned. I figured a sunken killer robot would be very rusty and its scream might be staticky. (The static is an altered bedrock texture btw)

I personally get spooked by zombies in all media, so I like to swap them out in mc as it makes it easier for me to kill them. They are one of the least challenging mobs, but with the added distress of them being zombies I struggle.

This texture is based off of a robot texture from https://minecraft.novaskin.me/gallery/profile/101045064415575479796, I changed things quite a bit and am using colors and textures from iron golems.