After leaving the Western Sea, Vaan made a quick stop at the Red Dragon Clan to drop off more samples of Golden Dragon Blood.
At the same time, he also made arrangements for the UN to strengthen its border defenses, especially the Great Ratholos Empire. Due to its special relationship with the Sea Serpent Clan, it did not take him much time and effort to subjugate it.
In fact, the sea serpent leader took the initiative to swear allegiance upon seeing him. It was as if it had been expecting his visit. Moreover, the sea serpent leader's determination was even reinforced after seeing him in person.
No doubt, it had sensed his Boundless Sea and Sky Aura—or Conqueror's Aura, according to the marine clans.
Nevertheless, the Sea Serpent Clan was among the weaker marine clans and wasn't even the actual ruler of the whole Eastern Sea. It only occupied the Eastern Sea's westernmost sea region and was a subordinate clan to the Razorfang Serpent Clan.