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This expedition proved to be exceedingly beneficial for Reiger.
Previously, the highest floor he reached was the 17th.
There, he encountered the floor master Goliath, and after a life-and-death struggle, he successfully advanced to Lv. 4.
Since then, although Reiger would enter the underground city every day, due to the need for same-day return, he would only descend to around the 20th floor at most; anything beyond that was uncharted territory for him.
Therefore, in these two weeks, as Reiger followed the Loki Clan's expedition team deeper into the underground city, he also witnessed many unheard-of wonders.
For example, from the 19th to the 24th floor, the region known as "Big Tree Maze," resembling an underground forest.
For example, from the 25th to the 27th floor, the region dubbed "Water Mysterious City," known as a water paradise.
And for example, the wilderness regions that one would occasionally encounter from the 30th floor downwards.