From publisher blurb:
Each Creature Feature presents acid-covered predator that stalks sewers and other places of refuse. Their touch can dissolve weapons, equipment, and armor; and they can spew forth corrosive slime.
Creature Feature Mummy Templates presents both types of mummy -- guardian and mummy lord -- presented as templates that can be added to most other creature types. Why should all your mummies be the same when they can differ by creature type, race, profession, experience, and the like?
Each mummy template also comes with an example creature build: the half-folk guardian mummy and mummy lord dwarven priest of war, respectively.