The situation was urgent, and Kant did not stay at the salt mine posthouse for long.
They continued trekking towards the Oasis Lookout.
It took him two weeks to get back to "Drondheim" Castle, but it was also the last week of the month. Kant did not have much time left, and it was very urgent.
On his return journey from the depths of the Nahrin Desert, he could clearly understand the advance range of the Sky Veil of Death.
He estimated that it would reach the north side of the salt mine in two months.
In four months, it could cover the entire south side of the salt mine posthouse.
In five months, it would be enough to expand to the Oasis Lookout and directly swallow the castle that stood there!
If he did not want to face a catastrophe, he had to make preparations. For example, as the mage apprentices said, one of the methods was to specifically study the sun disk, which could gather positive energy and weaken negative energy.