Thanks. The idea of a sword breaking is inspiring!
According to komekami, the main plugins he used were Serum, OTT, Ozone9, and he also used a lot of sample sounds from Splice.
Thank you for the follow up! I never would've guessed this was Serum - this music sounds so original. But then again, I might not have spent enough time with OTT. In any case, your partner picked a very nice sound palette for this project.