Are these sentences correctly worded and structured?

FYI- Kleef and Arietta are the two companions and both them and Malik are Chosen. As the two companions were making their way out of Sadrach’s castle, Malik once again attacked them, but he was quickly subdued. Malik revealed that Cyric had ordered him to kill the other Chosen, but Arietta and Kleef still decided to allow him to live, since the god of strife’s punishment for failing would be worse than death. Kleef and Arietta knocked Malik unconscious, and when they then departed from the castle to return to Cormyr, they discovered that new ground was filling in the vast void that had once been the Underchasm.