Quest:The Power to Destroy...

Not to be confused with 

The Power to Destroy... is a Horde quest designed to send Forsaken and blood elves to their first dungeon, Ragefire Chasm. Players must kill members of the Searing Blade until they recover two spell books and give them to Bragor Bloodfist.

Objectives
Bring the books Spells of Shadow and Incantations from the Nether to Bragor Bloodfist in Undercity.
 * Spells of Shadow
 * Incantations from the Nether

Description
Many denizens of the Legion bestow gifts on their followers as you may well know. Some of these gifts the Dark Lady feels would be better off in her hands than in the hands of those with... lesser vision.

A sect of the Shadow Council hidden in caverns below Orgrimmar known as the Searing Blade are a prime example. The Lady tells me that members of the Searing Blade have come into the possession of two powerful spell books—she would like to "borrow" these books from them. You will get them for her.

Progress
There are a hundred other tasks awaiting my attention,. Do you have the books?

Completion
Good,. You have done well in serving the Dark Lady. Your continued perseverance and ambition will be of great use to the Lady's subjects. Return to me again in the future. Perhaps I will have other tasks for you that will aid the Dark Lady in her attempts at overtaking the Lich King and completely freeing the Scourge.

Gains

 * 1750 XP
 * 500 reputation with Undercity

Details
The quest given by Bragor Bloodfist next to Sylvanas in the throne room in the Apothecarium. You need to find the Spells of Shadow and the Incantations from the Nether. Both books are random drops from the Searing Blade Cultists or Searing Blade Warlocks. If you don't get all the drops, then you will have to do another run through to get them.