Heart of Fear is one of the three launch raids that opened in World of Warcraft: Mists of Pandaria. This is the seat of the mantid dominion, and a place where the Queen of the mantid currently resides, possessed by the Sha of Fear.
The entrance to this raid dungeon is in the base of a large rotting tree structure in the center of the Dread Wastes.[39, 35]
Normal mode opened October 30, 2012, first Raid Finder part and Heroic modes opened on November 6, 2012, and second Raid Finder part opened on November 13, 2012. Raid Finder difficulty requires an average item level of 470.
Grand Empress Shek'zeer
The Dread Approach: After the Grand Empress Shek'zeer's army is repelled during  The Wrath of Shek'zeer, the Klaxxi-aligned adventurers venture into the Heart of Fear to finish the job.Imperial Vizier Zor'lok, previously seen during  The Empress' Gambit, stands as the first boss, constantly spouting praise of his fear-driven empress and using powerful sonic magic. After silencing the zealot, the adventurers face off against Blade Lord Ta'yak, the mantid blademaster who weilds great skill with both steel and wind magic. Progressing upward onto a great terrace, the mantid mages of wind summon Garalon, mightiest of the mantid's Kunchong. Though it's carapace was mighty, the adventurers killed the beast by destroying it's legs to weaken it.
The Madness of Shek'zeer: Fearful of the coming threat, Wind Lord Mel'jarak rallies the remaining elite mantid forces to guard the empress' inner sanctum. Slaying him, the final room before the throne room is a expanse of experiments of Amber-Shaper Un'sok, chief scientist and former associate of Xaril the Poisoned Mind. The fearful mad scientist threw every experiment he had at the invaders before falling. During the final battle, the Sha of Fear empowers Shek'zeer, allowing her to use a combination of sonic and sha magic. As she dies, the Sha of Fear escapes, later to be hunted down to the Terrace of Endless Spring. The Klaxxi presumably take up leadership until the next empress is born.