I’m honestly not sure if this is bugged or what, but the Spectral Crown MI feels like way too rare of a drop. GrimTools says it should be about 29% (which, even that feels too low). To compare, most other MIs from bosses are at least 40% according to GrimTools. Hidden Path boss pants are 40%, Cronley’s Signet is 43%.
I’ve also run this boss many, many times (at least 20 - I even specifically only ran this boss for a bit) and only gotten the MI 3 times now. It certainly doesn’t feel like it drops 29% of the time, but that might just be RNG. Perhaps there’s a bug where the 84 version is attempting to be dropped but isn’t dropping? I don’t remember getting anything but the 94 version.
Regardless, feels like this MI should drop more than it currently does.
EDIT: Link for reference, not direct cause not 3 posts
Wraith of Sorrows drop rate: grimtools.com/monsterdb/180/items