I've been told by others that it does not drop anything anymore and is supported by the fact that there has not been a Harpe sale since Oct 2018. For a drop worth 2 mil you'd think it get camped more.

I've killed him in many ways, many times, after server shutdown, sometimes he pops at daytime too because the undead there are kinda broken too, and eventhough he used to drop ( I got a drop last year ), on my experience he doesn't give any kind of drop anymore, not even exp. So yeah, pretty broken, I wouldn't bother spending time camping it.

EDIT: As a side note I want to point out that Ancient gobbue also doesn't drop anything, and he used to have 100% drops on retail.

I stand corrected. - edited.