Which bosses drop an Umbral Item?
I wish to know which bosses has obtained an Umbral item, one of those is example lady tenebris hold the umbral spellbook, who can be found at the old masonry part of forgotten knowledge quest, which is interesting from a lore-wise point of view, so were nice to know which other bosses share this peculiarity, if possible, add the content which these bosses belong to, maybe some of those belong to the same quest/area~