Codex: Eye of Terror (2003), p44 — Plague Zombies

To represent the hordes of Plague Zombies unleashed during the Thirteenth Crusade, use Mutants with the Bloated Blessing of Nurgle. Zombies may not take any weapon upgrades or include a Boss. They are however, Fearless, and hence will automatically pass any Morale or Leadership test and cannot be Pinned. Because of their shambling gait, they will always move as if they are in difficult terrain.