After arriving at Fire Ant Swamp, Russell left the convoy behind, leaving Black Oil Dragon Rosai and Simulated Nightmare Beast Dragon Sembra to continue onward with it.
He himself rode Sacred Unicorn Polly, carrying Harpy Harpie in the form of the Lord of Storm Mark, and headed straight for Blackfire Land.
There was no sound of wind whistling.
Fine sparks of lightning flickered everywhere around them. Russell and Polly, man and horse, streaked across the sky like a golden bolt of lightning.
"This is really fast!"
Looking down at the land below, Russell exclaimed in delight. After he and Polly had advanced to Phantom Dragon Knights, their speed had entered an entirely new realm.
"Polly, we're doing at least Mach 3 right now!"
"What is Mach?"
"Mach is the speed of sound. Mach 1 is one times the speed of sound, Mach 2 is twice the speed of sound, and Mach 3 is three times the speed of sound. We're moving at least three times the speed of sound!" Russell did not actually understand what Mach was; he only knew that Mach meant the speed of sound.
Dragon Sleep Continent did not even have a concept of the speed of sound, so Russell could define these terms however he liked.
Thus.
A short while later, the Phantom Dragon Knight flying at Mach 3 had already caught sight of his territory, Blackfire Land.
Thick smoke billowed continuously into the sky from dozens of chimneys.
Cars trailing smoke traveled along black asphalt roads. Russell even spotted an experimental railway in the open area near Black Oil Mine, where a steam locomotive was slowly running along the tracks.
During the time he had been away, Blackfire Land's development had not stalled in the slightest.
"Letting my brother help manage the territory was the