I really like the monsters, and their designs, in Spiral Knights. They all seem to have something about them that renders them clever, specifically the bosses (IE: Snarbolax and the Roaramulus Twins)
One monster that I couldn't quite see much references from, though, is the Greaver. I like it's appearance, and I'd like to know what exactly inspired it's design?
It's inspired by the demon moths you see now and again in Japanese folklore. We had already done classic little devils with our devilites for the Fiend (demon) family and needed another that also had a 'demon' feel to it.