Complex sentence: Upon becoming satisfied that he achieved his objective, he returned to his family palace filled with pride, but was confronted by his parents, who were horrified by his atrocity and they immediately exiled him as punishment.
Split into simpler sentences: Upon becoming satisfied that he achieved his objective, he returned to his family palace filled with pride. However, he was confronted by his parents, who were horrified by his atrocity and they immediately exiled him as punishment.