Several days later, Huo Hai arrived at the Frontier Fortress of the Ink Lotus Domain once more. Looking at it from afar, he truly felt as though the blue sea had turned into mulberry fields. "Heh, when did I become so sentimental?"
After muttering to himself, Huo Hai released Little Butterfly. This time, he had returned to give the Vast Earth Empire a surprise. If word of his arrival got out beforehand, it would be troublesome. Few people from the Heavenly Soul Domain came to the Ink Lotus Domain, and those who did were generally not very strong. Anyone passing through the Frontier Fortress had to be investigated.
Having participated in the battle to defend the city back then, Huo Hai knew something about fortress cities. The Spirit Formation here was extremely sophisticated and even possessed strong anti-invisibility capabilities. Some Ferocious Beasts and Spirit Beasts also had innate abilities such as invisibility.
However, given Huo Hai's identity back then, he knew of a route. As long as he went straight up through the center of the fortress, he would not be discovered. This place was the central dividing line of the Spirit Formation, where its detection ability was at its weakest.
Under Little Butterfly's invisibility, Huo Hai charged straight up through the middle. Once he entered the fortress, things became even easier. There were no all-encompassing anti-invisibility measures within the fortress. Huo Hai passed through without visiting his old friends, instead leaving directly from the fortress. Before long, he arrived at another internal fortress of the Vast Earth Empire.
The reason he had taken this route again was because this was the only Frontier Fortress Huo Hai knew well. If it had been another fortress, infiltrating it without a sound would not have been so easy. Moreover, there was another