This includes items and quests that can no longer be obtained.
The in-game information in this article is kept purely for historical purposes and should probably not be under any other categories.
A buff which allows one to see units cloaked by invisibility, this most notably does NOT include rogues. It does however include a number of demons such has those found in Dire Maul. There are three invisibility detection spells of which this is the highest, it has the same functionality as that of lower ranks.