Hello , i saw that there are arranged versions of "abyss" and "The black blood" from Phantasy Star IV in PSO2 soundtrack:
https://www.youtube.com/watch?v=wTW9_Pf7avE
https://www.youtube.com/watch?v=OoKh30Dih8I
Im collecting covers-remixes-arranges of Phantasy Star IV, and the last place i need to search is in phantasy star online.
I found these two. Do you know if there are more PSIV tracks on the PSO soundtrack?