Karazhan General Information:
10-man level 70 instance in Deadwind pass requires no attunement since patch 2.4.
Karazhan comes with the expansion; The Burning Crusade, even though it is set in Eastern Kingdom just east of Duskwood.
Bosses drop epics that are better then most heroic dungeon items and prepare players for Zul'Aman and beyond.
Bosses drop 1-2 badges of justice for a total 22 for a full clear.
Full clear takes 3-4 hours with properly experienced and geared teams.
Once entering Karazhan with a group, you become saved to that group untill tuesday morning 3am server time.
Midway boss, The Curator drops T4 glove tokens
End boss, Prince Malchezaar drops T4 helm tokens
Other then this, bosses drop epics too numerous to duplicate here, so here's the link:
teams should be composed of:
6 dps (2 CC minimum)
for comments, boss drops, and further lore