From the Back of the Book:
The Metamorphica is a collection of biological, psychic, and supernatural mutations, all grouped into tables so results can be randomly selected using dice, this book is a system-agnostic resource for campaigns for such diverse genres as dark fantasy, four-coloured comic book, post-apocalyptic, modern horror, science fiction, transhumanism, and weird high fantasy.
The Metamorphica contains:
Over 650 individual mutations, all with their own descriptions.
Physical and mental mutations, as psychic and supernatural powers.
Several different types of mutation-generating tables.
Lengthy random creature tables.
Procedures for using mutations in four different campaign types.
Procedures for creating aliens and demons.
Procedures for creating mutant animals, humans, and plants.