The flying boat continued forward for about an hour, and the surrounding mountains gradually flattened out. Accompanied by unusual fluctuations of spiritual energy, a deep cyan castle built within a valley appeared within everyone's sight.
The style of the castle was simple, spanning around a few thousand acres, encompassing a small town within its walls. It seemed the castle walls were constructed of giant stones containing wooden spiritual energy, which had become smooth after weathering countless years.
At this moment, the castle was surrounded by countless large and small grub-like creatures, attacking the ancient fortress like a tidal wave.
The entire ancient fortress was covered by a layer of cyan-purple protective shield, which sporadically burst out with flashes of lightning and fire under the assault of the grubs.
