Memorable ones. And without "levels" on items.
I never got to use the sword which you can only reach with the teleport / some other movement spell in Fort Joy, because it was already outlevelled every time I got there. It would've been great to find great items which are really unique and which we could use from the moment of finding / acquiring them until the end.
The only item with this properties in the whole game of D:OS2 is the magic wand which the unfriendly dude in Driftwood sells. There could be so many more.