Heart of the Mantid Swarm

Starts from a quest item mailed to the player upon completion of the achievement Heart of the Mantid Swarm.

When you turn in the quest, Lorewalker Cho tells you a story complete with a play-like reenactment and casts Storytime on the player.

"Oh my student - you wish to study the mantid? Be warned: the pandaren frontier is littered with the graves of former pupils. The mantid are harsh teachers.

Every generation, the mantid swarm the Serpent's Spine wall in great numbers. They murder many pandaren, so we kill many times their number in return. Yet each generation, they attack once more. Why do they do this? We pandaren do not know.

Our ancient writings indicate that the mantid have always been here. They predate even the mogu. Where did they come from? We pandaren do not know.
Here is what the pandaren do know. By massacring our people, by slaughtering tens of thousands of pandaren, generation after generation, they have taught us the value of life. A precious but fleeting gift. Easily snuffed out... in an instant.

That is what the mantid have taught us."

You can have Lorewalker Cho tell the story again by talking to him or clicking on the book that is added to your bookcase in the Seat of Knowledge.

For some reason it doesn't show up on my map, but you turn in and find him located at 83, 29 in Vale of Eternal Blossoms (just above the Mogu'shan Palace dungeon).

A reference to Star Craft 2's Heart of the Swarm Expansion which focuses on the Zerg, an Alien race that swarms over their enemies with overwhelming numbers to achieve victory.