Mutation category expansion

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Why not make it that with a high enough cooking and other relevant skill, you could design tier two mutagens? Discover and develop them yourselves after your character has become familiar with mutagens. I don’t mean the character design them yourselves, but have a wide range of premade ‘hidden’ mutations that your character can design based on the new world, with more specific and ‘exotic’ mutagens such as salamander, wasp, snake, etc.