Description from the publisher:

With the Maul Villain Pack, you can bring one of the galaxy’s deadliest Force users to your games of Imperial Assault, either as a powerful piece in the Imperial player's greater campaign designs or as an independent member of the Mercenary faction, ready to join any skirmish army that might allow him to further his own interests.

In either case, you'll find Maul eager to claim vengeance. To that end, he may be willing to stick to the Coruscant shadows and skyrises for a short time, stalking his prey, but it won't be long before his rage ...