The curse has taken over the expedition members' higher brain functions, but my calculations reveal that their suppressed adolescent subconscious can still be stimulated by realistic imagery.
Use this holo-projector to distract them.
They are currently setting up explosives at the tomb to the east to attempt to gain access to secret passages in Uldum.
They seek dangerous re-origination technology beneath Uldum and most be stopped.
Progress
Greetings, user <name>. I am happy to see you are still unaffected by the effects of the expedition curse.
Completion
Well done, <name>. The expedition has already doomed itself.
There is no need for it to endanger the rest of the world as well.
Pick up Core Access Codes before heading out. Head west. The ground is carpeted with hostile Cursed Engineers, who hit quite hard. Luckily, the Projector can be used while in flight, so do so.
The three bomb clusters can be found in a (roughly) north-south line along the center of the Tomb of the Sun King. Check both above and below the terrace. Bomb bots are all over the area without a fixed position, and these mobs are friendly.
The projector, when dropped, has a chance of displaying one of the three options, and the gnomes will respond accordingly: