Lay down an offering of stolen scythes before the two statues, Va're'nok the Swift and Andan the Stalwart, in Spiroc Foyer by right-clicking the base of each statue. This starts a 10 minute timer.
You may wish to clear the mobs all the way down the hallway before doing so, to aid in completing the next step.
Kill the four winds that spawn 1 at a time leading up The Walk of Flights from Spiroc Foyer to The Vestibule of the Four Winds within 10 minutes.