Noland Lee conducted a brief analysis and drew a conclusion.
This wizard was most likely not a deep-sea wizard or a mental wizard but possibly a shapeshifting wizard or an elemental wizard.
Why so?
Well, it's not complicated. Noland Lee used the process of elimination.
The detection spell of a Nine Circles Deep Sea Wizard, such as Selena's, could extend to the seabed thousands of kilometers deep.
Not to mention high-ring-level mental wizards, who could monitor a space of several hundred kilometers in all directions with "Mind View".
Factions like death series, natural system, and metal system all lack means of detection at sea.
After eliminating the wizards from these factions, that only leaves the shapeshifting and elemental factions involved in the water realm...
The shapeshifting and elemental factions could be considered members of the freshwater magic realm.
Their water detection spells would be greatly reduced in the deep sea.