After fifteen days.
Arthur and the remaining two are still tied down in the same room and for their dismay, the dead body wasn't even removed, not being able to access their spiritual energy due to their cultivation being sealed, they are almost starving to death.
Sam didn't even bother to let them eat to their fill, only giving them some bread at a random time, he has more important things to do.
On this day, he came back with three recording crystals in his hands.
His bone throne is left there intimidating them further, they weren't able to see the throne clearly when they first saw, so they couldn't identify the material. But after fifteen days, they clearly saw what kind of materials were used and that gave them chills.
Arthur was sweating buckets with barely any sleep. He has been in odds with Sam many times and he was afraid what would happen if Sam wanted to settle scores.
He might become an extra decoration for this chair.