Though Umbra drops every fear raid... this would be the main item to seek. The bracers a fairly nice too.
I would HIGHY recommend Fear to all shadowknights 46 to 54. The Earler the better.
Umbra is damn good armor for those lvls...
Seek out your servers Public form or Raiding guilds and ask to go with them. Do this over and over until you get on one. Follow the raid rules with out question. Be friendly and kind. Make sure to ask the "Raid leader" when the next is to get on.
Expect to die 1 to 7 times, until you get use to how to live though raids. Mostly... 90 to 96 clerics are there.
Good luck my fellow knights. Remember lvls 49 to 54 sucks nut for sk... but after that... it just gets better and better.
Stick with it =)
Painmer
56lvl
The Dark Trollie Knight
CoN
Lanys