Facing the gaping mouth of the vampire in front of him, large enough to swallow him whole, Rosen's expression turned cold. He swung a big haymaker, directly sending the vampire tumbling head over heels, rolling on the ground a hundred times.
Taking advantage of the vampire's hundred spins on the ground that weren't finished yet, Rosen quickly fled into the passageway.
The vampire's spinning was like a countdown of a hundred; soon he would come to catch Rosen, so Rosen had to find a hiding place before the countdown ended, as he must not be caught.
Rosen realized the passage was straight, with nowhere to hide.
"It seems this Underground Palace is too vast. A corridor that might be a hundred meters outside could be ten thousand meters here. I must speed up quickly."
Rosen thought of the principle of biogas fermentation. If he could prepare this combustible gas in a short time and ignite it to create jet flames, perhaps he could propel himself forward to reach escape velocity.
