After digging for a while, the expedition members were finally able to see results. A tunnel was discovered when they dug down tens of meters. Obviously, it was dug by not the expedition members but someone else, and now, they had to use this tunnel as the entrance. They had to climb down the rock wall before going up, but it wasn’t a problem since they had been making holes while they dug. As the expedition members went down one by one, they all nodded in realization. Compared to the cold outside, the inside was as hot as if someone had turned on a boiler.

To be exact, the temperature was just lukewarm, but the warm air flow was proof that a tohari was close by. In addition, the tunnel was wider than they expected. Over two meters in diameter. And it was hard to judge the length of the tunnel. All things considered, the tunnel was unlikely to have formed naturally, and Hawa was right. The castle was not somewhere above; the entire flying land was Sernitas’ Sky Castle. There was no time to look around and explore. The expedition team immediately drew up an operation plan and carried it into action.

Since they didn’t know the exact location of the tohari, the plan wasn’t terribly fleshed out, but it did give them a sense of direction. “Let’s first go to a place where the temperature feels higher.” The marching began with Hawa taking the lead.

Everyone walked as quietly as possible,...