Although Joshua really wanted to venture into the dimensional rift right now for a new adventure, it was pretty obvious that it was not the perfect timing for him to explore the new world just yet.
At this moment, they were in the depths of a volcano and they did not carry much supplies and equipment along with them. They only brought along some equipment and instruments that were useful to their exploration. All in all, they were prepared, however, for another purpose, not for venturing into a new world.
Right now, the high temperature that could spontaneously ignite a human body, had been reduced down to the level where it could only dehydrate a human body. In other words, the temperature was reduced to the point that it could slightly be endured now. Meanwhile, Black was swimming effortlessly in the lava. The core on its chest was blazing with gold radiance, absorbing the energy from the lava.