It took a little bit of time for Lyle to explain, as briefly as he could, what was going on in the world to the four people. If they were going to follow them and be a part of their group, they would need to know what was going on.
Most people only knew that the corruption had appeared at one point in time and was spreading through the world, practitioners of the dark arts helping it spread faster, and nothing else.
Learning that there was a being of immense power that had been sealed god knows when in the world and that it was trying to break out was shocking to the four people who needed some time to process it, but not too much as Lyle and the others were going to leave soon as they knew that time was slowly running out.
The corruption was spreading faster than anyone had anticipated, and the fall of Ravencourt had thrown the entire region into disarray. With the Flowing Wind Empire teetering on the brink, Lyle's group needed to act decisively.