Sieh's... Goals

So i have a general idea of a fun excursion that Sieh would be extremely interested in. His entire life's work is to create a super race devoted to Lamushtu his goddess mother. A rumor of some odd creatures spark an investigation about some mismatched and deformed creatures. Meet an alchemist or wizard/sorcerer ect that has already begun. Would be a great chance for dms to try and create some unique enemies, mix and matched pieces parts of creatures.