Surprisingly, Merlin found the aura of Longinus here.
Wasn't Longinus a high-level Spiritual Weapon? Merlin guessed that it was even from the four yānas so he was unable to summon it.
There are many ruins at the bottom of the water lake. Each of them contained precious treasures. There are many Spiritual Weapons hidden here.
Merlin harvested two treasures. With his concentration power, finding the surrounding treasures was not difficult.
Not only the Spiritual Weapons, but Merlin was also able to determine which ancient site was guarded by Spirit Beasts.
Of course, each place had high-level to king-level Spirit Beasts.
In some areas, Merlin could even feel mysterious energy. He assumed that it might be the power of Legendary Spirit Beasts.
Whichever the case, Merlin's current combat power would not be able to provoke these beasts.
Even if it was a high-level Spirit Beast.
He didn't want to risk clashing with the legendary-level whale.