Not that I don't like the material (I do), it just seems a bit overpowered. Take for instance Devil Tyrant Avatar Shintai. It has a Essence 3 requirement. Essence 3 is the maximum Essence a mortal may achieve.
What is stopping you from taking the Gargantuan Mutation multiple times and going to town?
What is stopping you from taking the Gargantuan Mutation multiple times and going to town?