Munchkin Warhammer 40000: Faith and Firepower - Rules of Play says:
Expand your battles with Munchkin Warhammer 40,000: Faith and Firepower! This 112-card set includes two new armies for Munchkin Warhammer 40,000. The Sisters of Battle are some of the most elite Imperial soldiers around, and the T'au make terrifying enemies...or stalwart allies in the war against Chaos. Plus lots of new loot and horrible monsters to fight!