It is required for the Historian of Caldeum achievement.
It reads as follows:
We, the Zakarum, have endeavoured to make Caldeum a city of mercy and salvation, but we have not yet been able to convince the emperors to change the ancient policy of exile. Prisoners convicted of treason are still sent to the Desolate Sands to die with nothing but the clothes on their backs. — Lysra the Zakarum Archivist
In thousands of years of records, I cannot find a single account of a prisoner surviving exile to the Desolate Sands. The wastes are littered with bones that have been picked dry by the endlessly circling blood hawks or desperate lacuni. Those who die there meet their end without the sanctity of the Light. — Lysra the Zakarum Archivist
The Zakarum scholar Brast wrote that the Desolate Sands were created after a mage-clan battle sent out explosive energies that devastated the entire area. But he doesn't account for the enormous skeletons... No one has ever identified them. Were they a lost race of giant beasts? Demons? Mythical dragons? We may never know. — Lysra the Zakarum Archivist