Fang Ka stepped to the seaside, gazing intently at the surging sea beneath.

Here by the sea, there was evidently no perceptible force of obstruction.

It was clear that the range of this Magic Array should be underwater.

This was also why those Gana never surfaced on the sea.

Fang Ka crouched down, extended his hand into the seawater, gently stirring it.

The next moment, a Water Arrow condensed from his fingertip, shooting downward with lightning speed.

This Water Arrow descended about ten meters before being directly dissolved by an invisible force, as if it never existed.

He used the most Basic Water Magic, the Basic Water Arrow Skill.

This belonged to the Water Element Magic used by Magic Apprentices and posed no threat of harming this Magic Array.

After all, among those Gana, there were Middle Tier Mages, and they couldn't escape, so this Basic Water Magic surely couldn't cause any damage.

He merely used this Basic Water Magic to determine the general area covered by this Magic Array.

Fang Ka stood up again, then stepped away into the distance.

After walking about a thousand meters, he stopped and repeated his actions.

He found that there was still an invisible obstruction force here.

He again roamed around testing and eventually found that this Magic Array covered about five kilometers of the northern coastal area.

After confirming the general area and the basic characteristics of this Magic Array, he had some insights into it.

Returning to the Ancient Castle, he made his way to the Underground Library, retrieved a thick book, and began to flip through it.

Kain had left behind a book he compiled himself in the library, which provides detailed descriptions of the Magic Arrays within the Underground Library.

The only pity for Fang Ka was that the book only described the function and effect of the Magic Arrays without corresponding level descriptions.

Otherwise, he could have inferred Kain's Power Level based on these Magic Arrays.

Based on his recent field survey, Fang Ka deduced that two of the Magic Arrays in the book matched the situation.

He now needed to carefully review the detailed descriptions of these two Magic Arrays to make a final determination.

His gaze scanned back and forth across the descriptions of the two Magic Arrays in the book before finally coming to a halt.

The two Magic Arrays had a lot of similarities, the biggest difference being that one of the Magic Arrays could open a temporary entrance/exit.

Fang Ka set the book down, walked to a deep blue Magic Array, and stopped before it.

The Magic Array was triangular, with a mass of deep blue arcane Magic Patterns floating and rotating, casting a faint water wave reflection.

"Since those Gana need to be experimented on, they must be taken out, so the Magic Array that can open a temporary entrance/exit at any time certainly fits best."

"I could follow the method described in the book to use this Magic Array to open a temporary entrance/exit at any time."

"Moreover, I could set this temporary entrance/exit to be one-way, allowing entry from the outside but not exit from the inside…"

Fang Ka's gaze fixated on the Magic Array in front of him, furrowing his brows slightly.

But the problem is, he needed the bodies of those Gana.

If set to one-way, entering would mean killing those Gana, but the bodies couldn't be brought out.

Setting it as two-way is too dangerous; if those Gana seized the chance to escape, it would be very troublesome.

The best approach was to first set it to one-way, then enter to carry out a decapitation strike, dealing with the knights and mages among the Gana, leaving only ordinary Gana.

Subsequently, switch the temporary entrance/exit to two-way and have someone guard it.

However, it was still uncertain whether there were High Tier Mages among the Gana.

He suddenly remembered that Xia Lin seemed to be about to break through to a High Tier Mage.

And there were records in the library of a very special High Tier Water Element Magic among the Merfolk Race, which seemed just right for the occasion.

This High Tier Water Magic was called 'Water Wave Resonance', and it inflicts magic damage on creatures with magic power within the targeted range.

The only limitation of this magic is that it can only be used in water.

Therefore, this Water Element Magic of the Merfolk Race might not be very useful for humans because humans live on land and need to create a suitable environment with Water Magic first to use it.

But for the Merfolk Race, who live in the ocean, it was a very useful magic.

The battles of the Merfolk Race mostly occur in the ocean, and this magic can help avoid ordinary tribespeople from being caught in the crossfire during conflicts.

For the current situation, it's just fitting, since employing this High Tier Water Magic would attack all mages within the opposing tribe.

If the opposing side had High Tier Mages, they would certainly be unable to hide any longer and would be forced to come out.

If not... then it would be simpler, asking Xia Lin and others to help clear out the mages and knights among the Gana, leaving the large number of ordinary Gana for the players to practice with.

After practice, the bodies could still be returned by the players to serve as embryos for new players.

The Gana, being naturally amphibious, had bones that were well-suited as vessels for players.

After contemplating this matter, Fang Ka exited the Underground Library.

He then stepped toward the beach to find Xia Lin.

He soon saw Xia Lin at the beach. Xia Lin glanced at Fang Ka's face then spoke first: "Lord Fang Ka, I wonder what business you have with me? Is it about the Gana race?"

Fang Ka nodded slightly and then said: "Yes, I've already inspected the northern area and found the Magic Array trapping the Gana race."

"I can use that Magic Array to create a temporary entrance/exit in the area sealing off the Gana."

"This entrance/exit could be one-way or two-way; I wanted to ask when you might break through to a High Tier Mage?"

"Once you've achieved High Tier Mage status, I'll open a one-way entrance/exit in that area, and you can use the one-way entrance/exit to cast Water Wave Resonance."

"This way, we can confirm if there are any High Tier Mages among the Gana."

"What do you think, Xia Lin?"

Xia Lin considered for a moment, then replied: "I have a feeling that I should be able to break through to High Tier Mage within three days."

"Lord Fang Ka, as expected of Mage Kaen's favored disciple, you even know of the Water Wave Resonance magic of my Merfolk Race."

"Once I break through to High Tier Mage and master Water Wave Resonance, I'll coordinate with you, Lord Fang Ka."

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