A Worthy Challenge: Xin the Weaponmaster (Horde)

Objectives
Complete the Mogu'shan Palace Challenge Mode

Description
, I need you to assemble a nimble group and lead them into Mogu'shan Palace. Activate the Challenger's Orb therein, and put an end to Xin the Weaponmaster.

Return to me when you've completed this challenge, and I shall reward you handsomely.

Completion
Many thanks,. Your martial prowess is second to none, and your alacrity is sure to strike fear in the hearts of your enemies.

Gains
You will receive: Upon completion of this quest you will also gain:
 * Heroic Cache of Treasures
 * 80 Valor Points
 * 471,000 XP