Although Long Dangdang and the team had discovered four wraith altars within a day, their exploration was centered around Stone Gate City. Moving forward, if they wanted to discover more wraith altars, they would either have to venture further away, which would significantly reduce their efficiency, or switch to another Big Wraith City as their core for exploration, such as Calamity City, the capital of the Wraith Empire. However, this would also increase the risk. How to choose was an important issue.
Long Dangdang opted for both approaches. They continued to explore the area surrounding Stone Gate City, heading towards more distant places, and then tried to find some patterns through the distribution of these wraith altars. If there were patterns to follow, then locating more wraith altars would become much easier.