A set of fully play-tested rules I wrote a few years back for Mordheim that allow you to further expand the basic undead warband in Mordheim. Includes rules for Liches, Skeleton Champions, Skeleton Warriors and Ghosts, presented in a professional looking PDF format.
The Restless Dead
Warband Rules PDF
Original version PDF (with conversion tips)
A Liche is a necromancer who was wise enough never to expend his own life energy to fuel his spells during his lifetime. As time eats away at his body, he retains his soul which allows him to manipulate magic, which is what separates them from pitiful wraiths. Unfortunately, the undead bodies of the Liche are not capable of retaining magic forever. They must absorb massive amounts of magic through the use of dark rituals and forbidden spells. The most common ritual involves the devouring of the soul of a human. The soulless human becomes a zombie under the Liche’s control. This continues until he is discovered.
When a Liche is found, great armies are sent against it. The Liche retaliates by creating armies of undead warriors to defend itself, expending vast amounts of stored magical energy to do so. Win or lose, the Liche is greatly weakened in this process. More often than not, the Liche is crippled such that he is incapable of bringing himself to his former strength. In this event, the Liche has two options. Most of them wander south to the forest of Lorien where they seek the wild and infinite magic of the wood. Some wander north towards the Chaos Wastes where they are almost always discovered and destroyed en-route. An even smaller percentage go west in ramshackle boats towards the lands of the High Elves... so far, only a small handful of Liches have ever lived in their undead state for very long; even fewer return to fighting strength after crippling defeat.