While liches are very common enemies in may a things they are still far less common then lets say dragons or demons and while skeletons with armor are also rather popular enemies a lich who's bones have been fused with metal and a steam engine powered exosuit that is powered by soul infused coal are, well far less so. However Warmachine has many common stereotypes especially in Khador, Cryx, and Menoth. Yet we should never look at what the art is of and rather the style and flair that comes with each piece, I find cryx interesting not because they are an empire of pirates, necromancers, and the undead, but rather because of how they are designed as a whole.
