I actually came to Befallen to get the icon for the Ardent quest. Then I came across this female DE shadowknight I had never seen before. I rooted and nuked her. Aside from a 180+ initial blast, she did little damage to me.
Her loot? 3 keys, dark elf parts (great for cooking), and the barbed legplates -NICE!-
I looked all over for this girl back in my 20s to get the legplates. Now I don't really need them. Go figure. ;P
Btw, she wasn't in the tunnel section. She was in one of the rooms on the 3rd floor, next to a skeleton.
If you want to find her to get the legplates, I suggest roaming all over that section of the dungeon cuz obviously she shows up in various spots, never just one.
Opaque Sanctus
41 Cleric
Mor-Thule server