Rhein said with a hint of apology, "Sorry, Rod, this is our mistake. We didn't calculate the itinerary and the weight of the battle properly. We are eager to arrive at Trolian as soon as possible, and in the heavy Black Fog, such high-speed flight is very dangerous and difficult. To reach Trolian quickly, my Spiritual Energy has been consumed too much."
Rod asked in surprise, "Heavy Black Fog?"
Rhein explained, "From the far end of the Black Fog Great Plain to the Upper Heaven Taboo, there is at least 70,000 miles of distance. The concentration of Black Fog is extremely high. Even my vision cannot exceed 20 miles. The erosion force of the fog is equally strong, so it is necessary to use Spiritual Energy to augment the Fire Spark to counter it. Even those who have stepped into eternity would not stay in this area."
