I'll admit this upfront - BioPheyden is one of my favorite of all the possible Glyos combinations.
Again, please note that I have customized him with the dirty parts, et cetera, yadda yadda, rinse repeat.
BioPheyden can be built from parts already shown on figures in the checklist.
I'll leave you with the official description from the Glyos Blog:
Bio Pheyden is one of the strongest alternate Pheydens in any known dimension. He wears a special hardened Flexion Suit to protect agains the influence of the Villser creatures.