Su Xiao sat on the bed| in the cell and closed the world introduction. It contained quite a lot of information, the most important of which was the danger level of this world.
The danger level of Demon Spirit Star was Lv.42–Lv.72. The former could be ignored, but the latter was a lethal threat. Demon Spirit Star was indeed a Tier 7 world, but in certain areas, its danger level had already far exceeded that of Tier 7.
It could be said that there was no obvious difference in strength between top-tier Tier 7 Contractors and newly promoted Tier 8 Contractors. Advancing in tier did not increase one's strength. What truly enhanced a Contractor's strength was the danger level and resources of a Tier 8 world.
After advancing to Tier 8, Contractors could obtain more resources. Moreover, those resources were of a higher tier, such as Immortal-grade equipment.
This allowed Contractors to improve their strength more quickly. After experiencing just one or two Tier 8 worlds, a huge gap in strength would open up between Tier 8 and Tier 7 Contractors.
Aside from resources, the danger of Tier 8 mission worlds also greatly improved the overall strength of Tier 8 Contractors. The reason was simple: those who lacked sufficient strength died after experiencing a single Tier 8 world. As a result, the average strength naturally became higher.
This time, Tier 8 Contractors had entered the western continent of Demon Spirit Star. If Su Xiao's guess was correct, those six people should also be in Mist City.
The historical changes of this world were quite unique. First came the "Black Smoke," or soul energy, which shrouded the land. The people inside the high walls had tried every possible method to escape its coverage, but later, they wished there had been a