Klaus and his friends spent the morning mainly talking about his time inside the trial. Klaus told them many interesting things, some from his fourth incarnation in the tormented world.
Of course, they don't know most of those things are from his incarnation. He wasn't about to let them in on something that unbelievable.
Klaus wasn't really concerned about them knowing about his near-death moments. He showed them everything using his memory and illusions.
Now, they all saw what he was capable of and could tell that if they listened to him, they would all become monsters in their own right.
Of course, Klaus succeeded in brainwashing them, which was very easy, considering he only had to show them a little of the real danger he had in store.
After they were done talking about everything, Klaus spent the rest of the day walking around Stone Valley with his mother, whom he planned on spending more time with before he went back out there.