Now that it is clear what Lucretia Nasin's purpose is, Chiara has requested, on behalf of the Ironforge Exchange, to retrieve what the Coalition is after before they get to it. I should search within The Crucible for items related to Miragul's ability to teleport through time, space, and dimensions.
The quest Making Sense of Miragul, Part 3 is exactly the same as this quest. You will need to click on the book and each of the Spacial Disturbances twice. Spacial Disturbances will only be clickable for the update for the second quest after you have collected all of them for the first quest. These are not group updates.
Both powders (the final update) will be awarded at the same time from the The Codexicon's loot window.