From the Celestial Immortal-level true dragon's dominance, numerous spirit monsters under the sea, regardless of size, flee at the sight of it, and for several days, not even a shadow can be seen, nor is there any sign of the Sea Snake Race pursuing.
After incinerating the corpse, he immediately used Star Shifting and Dou Changer to obscure the heavenly secrets. The Sea Snake Race could sense through their bloodline that a royal descendant had died, but they didn't know where it happened or who killed them.
Given the level of transcending dragons, combined with Star Shifting and Dou Changer, unless a Profound Immortal adept in heavenly secrets personally investigates, it's impossible to uncover the truth.
A powerful race like the Sea Snake Race certainly has Immortals skilled in heavenly secrets, as well as Profound Immortals, but having a Profound Immortal skilled in heavenly secrets isn't guaranteed.
