Is that a Wisp?

Every time the Cloud Whale passed overhead, Feifei became happy. She gradually noticed that Krune's mental state had recovered over the days as she sent him messages by engraving them on the ground.

On top of that, she determined Krune's cycle, creating a message on the ground only a couple of minutes before he arrived, erasing it soon after the Cloud Whale passed by. This way, she ensured none of the demons saw her messages. 

She also took measures to engrave the messages only in places where no demon ever appeared. By sending scouts to follow the line of demons marching forth in the valley nonstop, she determined that their destination was a human city. 

There was a total of 24 such cities. And accordingly, there were 24 lines of demons marching towards the respective cities each. While scouting through on the opposite side, Feifei had noticed that most of the demons began to join into the line only when they approached a distance of 1000 kilometers from the Abyssal Trench. 

Beyond that, they were a scattered mess, walking out from wherever their respective Demon Nest was situated at. Two months had passed as she trained while sending the Monster Geckos to scout her surroundings, understanding the gist of things. 

The suffocating presence she constantly felt was from a Black Demon that was loitering about in a nearby area, having been sleeping all along while she scouted it, not once waking up. The Black Demon was the source of the suffocating presence, eradicating all thoughts about attacking it from Feifei's mind. 

Feifei also noticed that every time the Cloud Whale flew overhead, the suffocating presence from the Black Demon fell by a notch, understanding Krune's strength. "So, you're already at that level."

Two months since she had appeared at Layer 2, Feifei calmly approached the line of demons marching in the valley. Using her Wind Zone, she remained undetected, approaching a Blue Demon before enveloping it in her Wind Zone.

She pointed away from her and asked the demon, "I saw a human romancing about there?"

"Where? Show me the way?" The Blue Demon asked in a hurry, following Feifei as she began to run. Feifei had changed her appearance into that of a Violet Demon. So, her speed wasn't suspicious to the Blue Demon. 

As they began to run through the wastelands where not even grass grew, a lone figure came into view. It was currently kneeling on the ground, seemingly exhausted. It had draped a set of clothes on itself, causing its appearance to be invisible. 

But since demons never wore any clothes, it was apparent that the figure was a human. The Blue Demon didn't even wait for Feifei to say anything, taking action the moment it saw the figure, flashing past at her maximum speed, pouncing upon the figure to plunge its claws through its head. 

The figure's head splattered due to the power behind the Blue Demon's punch. But suddenly, the Blue Demon felt its hand had turned numb as it saw a layer of ice forming on it. Suddenly, numerous hands shot out from the ground, grabbing hold of it when the ground caved in. 

It revealed that the Monster Geckos had held onto each other to act as a trap. They had layered themselves atop a massive pit and covered their bodies with sand. The moment the Blue Demon arrived, they let go of their hold onto one another, latching onto the Blue Demon. 

Adding their weight and the way they attached themselves onto its body, the Blue Demon was unable to unfurl its wings and take flight, getting dragged with the Monster Geckos into the depth of the pit that was at least 30 meters deep. 

The ground fell into a pool of Monster Gecko blood, causing the Blue Demon's body to turn numb when it was incessantly attacked by the Monster Geckos. Then again, all the Monster Geckos were only the normal monsters from Layer 3. They weren't even the Mutant Monster Geckos. 

So, a single punch from the blue Demon splattered more than ten Monster Geckos. Of course, that too was a trap. After all, when their bodies burst, their blood fell onto the Blue Demon, hastening the formation of ice on its body. 

If it didn't attack, the Monster Geckos would constantly attack it. But if it attacked, the splattered blood would worsen its situation. Just as it came to such a conclusion, some of the Monster Geckos spat out a sac filled with blood on it. 

This was the sac filled with the coldest blood in their bodies, a trump card every Monster Gecko carried with itself. When the sac exploded, the Blue Demon began to freeze over even faster. Soon, it was unable to even move, having turned into a sculpture. 

Feifei jumped in at this time, plunging her claws through the Blue Demon's back, barely piercing through its body before she began to absorb its essence. Once it was done, she exited the pit, watching the Monster Geckos cover the hole once again using their bodies. 

She then headed towards the valley with the marching demons, luring over another Blue Demon. This way, she killed enough of them until she was able to condense a concentrated version of a passive ability.

Normally, just one demon's essence was enough for her to condense a passive ability. However, Feifei knew very well that as long as she concentrated the essence of a being to a certain extent, the generated passive ability would be the strongest of its kind. 

It's the same that Krune did for every passive ability he obtained. Now, Feifei was killing more Blue Demons just to condense the passive ability of the Blue Demon into its most potent state. After killing 10 Blue Demons, she had concentrated the passive ability to the limit, activating it as she turned into a blue Demon. 

Immediately, she could sense the differences, primarily the amount of miasma she could pull towards her now.  Upon reaching this stage, Feifei began to train nonstop, reaching Tier 3 as her body weight went beyond 200 kilograms.