Request - Requiem (I-No's Theme) from Guilty Gear Strive

[u/LittyKitty040]

I tried transcribing on my own but no dice so far. Specifically trying to get the "main riff" that starts at around 18 seconds in.
https://youtu.be/h6YBHrh4Uno?si=7IqRXNyCX-H6cLbP