Keanna's last few entries confirm our suspicion of a demonic presence atop Karazhan.
She detected the arrival of a Burning Legion agent whose location she described as coming from the top of the tower.
Her entries stop there.
Karazhan is a very important place, <class>. It is a portal into the nether, a beacon shining into other worlds. The possible repercussions of it falling into the wrong hands are unthinkable. The demonic intrusion must be stopped. And you, <name>, are the only one with the key.
Details
The player must fight his way to the top of Karazhan and defeat the final boss, Prince Malchezaar.