The Underground Black Dragon spread its wings wide, swirling through the sky, occasionally spewing a blistering Dragon Breath, sometimes unleashing various powerful Dragon Language Magics, attempting to exploit its nimble aerial advantage to triumph over the Rock Giant below.
Honestly, this kite-flying tactic of the Giant Dragon Clan is quite effective against Demon Beasts incapable of flight, as dragons can advance to attack and retreat easily, traveling at high speeds in the air, leaving land-bound Demon Beasts without any means to handle them.
It is this very advantage of having wings that allowed the Giant Dragon Clan to stand out among numerous level nine Demon Beasts, dominating the continent for countless years. Even now, in their retreat to Dragon Island, they remain one of the top-level colossal forces.
Otherwise, if they were flightless, those other high-ranking level nine Demon Beasts might not necessarily be weaker than them.