Assault in the Vale of Eternal Blossoms is part of N'Zoth's awakening on Pandaria. It involves the forces of Rajani defending against N'Zoth's nightmarish vision for Uldum.
Arriving at the entrance of Mogu'shan Vaults, Magni encountered a dying Mogu Warrior surround by mantid and others like him. While distrustful at first, the mogu showed respect for the Speaker's cause and asked Magni to let him lead him to his clan. But before he could take him, the mogu was struck down by Amber-shaper Gokilak. After taking care of the mantid, Magni took his sigil and made his way Lorewalker Cho for answers.[2][3]
After he obtained some information from the mogu in the vale, Cho and Magni managed to locate the clan. Going to the place, he was greeted by Stormspeaker Qian who led him to their leader, Ra.[4] However, the titan had become jaded about the whole affair and didn't believe they could win. To prove him wrong, the Speaker asked an Adventurer to bring him a [Conqueror's Trophy] from the N'raqi, Vil'raxx.[5]