Scarlet Halls is one of the two new 5-man wings of the Scarlet Monastery in Mists of Pandaria, and is a combination of the former Armory and Library wings. It is designed for level 28–31 players, and features a level 90 heroic version as well.
The Crusade's fiercest warriors, those who have held their ground and fought to defend the monastery throughout these dark times, are rapidly preparing an army within the Scarlet Halls. These soldiers are bound by their hatred of the unliving, and they are willing to sacrifice everything for their order's righteous cause.
Scarlet Halls Walkthrough (Bosses, Achievements, Loot, and Quests)