I really like centipedes and I think it would make quite the fun enemy or boss to fight!

That and millipedes!

Love the idea. They fit both as a normal tier 4 mob and as a boss. Terrifying and strong as well. Even a mount will be awesome.

The real issue is animating them so that they move in a way that looks naturally. They'd essentially need to be treated like a train without a track, with the head being the "engine" and the rest of the body separated into "cars", connected by a spline curve system that guides animation. Each body segment would have 2 layered animations controlling the angle for the front and back end of the segment, ensuring it connects smoothly with the rest of the body.