The Plague Priest and his fanatical followers have prepared a new plague to unleash upon the world. It is called the Yellow Death, after the way it turns its victims yellow before their bodies become bloated with toxins and they die!
The Yellow Death
If Morbus is included in your army, you may upgrade one unit of Plague Rats to Yellow Death Rats for +5 points per base. Yellow Death Rats have +1 Weapon Skill and Strength.