Wherever Vaan went, the nearby black mutant serpents followed. Before long, Vaan arrived at the X-shaped crevasse on the ocean floor.
(Your Excellency, we have arrived at the entrance to our Black Serpent Clan.)
The group of Transcendent-rank black mutant serpents eagerly informed Vaan, oblivious to the potential threat they could be bringing to their home.
Nevertheless, Vaan had long erased the intention of eliminating the Black Serpent Clan from his mind. Given the Boundless Sea and Sky Aura's influence on the Black Serpent Clan, subjugating it would be more useful than exterminating it.
That said, Vaan also understood that the present level of his Boundless Sea and Sky Aura had limitations. While it could command non-sentient species, its effects against sentient life forms were greatly restricted.