Reef Island, underground.
"Huh?"
As Rein descended to the very bottom, his eyes lit up, for he discovered not only the large swathes of anticipated dark red, swirling lava but also several exposed metal-colored ores on the lava wall.
Evidently, these are high-temperature-resistant raw ores, as ordinary rocks would have long been melted by the lava.
Aside from that, Rein also spotted quite a few creatures, varying in length from several meters, resembling dragons with bodies akin to crocodiles but entirely dark red, with two fan-shaped fins on their backs, crawling up and down the molten lava lake.
"What are these creatures? Judging by their appearance, they seem to have some Red Dragon or Red Dragon Bloodline?"
"But from the looks of it, the dual fins on their backs should originate from some aquatic creature. After all, this is a submarine volcano."
