Leo was fully aware of the fact that him attacking the 5 people of the Black organization guarding the entrance of the cave would likely alert those on the inside. It was pretty easy to guess that once he decided to attack, 3 would block him immediately while the other 2 would get inside to inform the others inside. But what if he can also stop those 2 from reporting to the others? More precisely, use an Earth Elemental to block the entrance of the cave.

"Hehehehe..." Leo chuckled before unsummoning 2 Wind Elementals and replacing it with an Earth Elemental. Afterwards, he turned this Earth Elemental into a toy soldier form before letting it sneak behind the 5 people of the Black organization.

"What are you planning?" Cassandra can't help asking while looking at Leo.

Charlotte on the other hand was observing the sneaking Earth Elemental interestingly as she silently murmured, "What is that little one doing...?"

Moments later, with a Whooosh! sound, the entrance to the cave was right after blocked by a stone, forbidding the people of the Black organization from getting inside to report to the others that someone has attacked them.

"Attack!" Leo quickly ordered Cassandra and Charlotte, which both of them nodded in understanding before making their moves.

Cassandra put her hand up in front as she summoned vines to bound the feet of the 5 people of the Black organization.

Bang! Bang! Bang! Bang! Bang!

With the 5 people restricted, though it would only last for a few moments, it then gave Charlotte the perfect opportunity to attack.

Whoooosh!

Charlotte disappeared from her location as she right after appeared in the middle of their opponent's formation.

Shinggggg!

With one circle swing from Charlotte's Six Headed Snake Twin Daggers, the 5 people's necks immediately spurted out blood.

But, to be more sure that they won't have any chance to give their comrades some signal, Leo threw 5 daggers straight to their heads.

Whoooosh!

Unlike any ordinary daggers though, the 5 daggers Leo had thrown were combined with Fire Element Mana, hence it quickly burned the inside of their heads into a crisp.

With that, the guards guarding the entrance of the cave were mercilessly killed.

Charlotte quickly burned their bodies to cover any traces of them being here.

Leo slowly walked towards the dead bodies, wanting to confirm whether they were really from the Black organization or not. And just like what he had expected, they were indeed from Black organization, which also confirms his other assumptions. Specifically, they are doing something that will threaten the lives of those in the Silver City.

"Let's go!"

After confirming their identity, Leo didn't waste any more time as he walked towards the entrance of the cave. Since his assumptions were confirmed, then he needs to quickly stop whatever the Black organization was planning to do in order to not also affect the Mischievous Blue Sword Alliance once the battle starts. He doesn't really know yet just how dangerous was the Black organization's plan, but what he can be sure about was that it is something that will benefit them one way or another.

Whooosh!

The path blocked by a stone wall was immediately opened up by the Earth Elemental, letting Leo, Cassandra, and Charlotte walk inside.

With how familiar Leo was already with this pathway, he was able to easily traverse it without much trouble, Cassandra and Charlotte were also able to stick close to Leo by simply following which part he has stepped on.

After five or so minutes of travel, they finally saw the exit. But, before they went for it, Leo first sent out a Wind Elemental to scout ahead. The Wind Elemental was summoned as it then blended into the wind and flew forward.

"Just like what I've expected..." Leo silently whispered to Cassandra and Charlotte. Up ahead of them were 20 people of the Black organization.

"Then what should we do?" Cassandra, who also understood what Leo meant, asked.

"Would we be doing the same strategy we did back in the entrance?" Charlotte added.

Leo simply shook his head after hearing this, "It would be impossible to do the same."

With such a big open space in front, it would most likely require him 5 Earth Elementals to successfully block it with an earth wall without letting any one of those people easily escape, which would actually still be useless because the loud sound of forming such a big earth wall alone would already be able to alert those in the deep part of the cave due to its echo.

Aside from that, with their numbers, it would be hard to handle all of them at the same time like what they have done back at the entrance, hence a few of them would still be able to destroy the earth wall and alert the others.

What's even more worst was, he was limited in Elementals right now. He only has 9 Wind Elementals to spare, which converted into useful Elementals is still not enough if he wants to use them to his advantage.

Cassandra thinks in deep thoughts before she suddenly taps Leo's shoulder, "How about let's create another path?"

"Another path?" Charlotte dubiously asked, "Is that possible though?"

"That..." Leo thought for a bit before confirming that it's indeed possible, "That is indeed possible. We can create another path from here connecting to a place where those people can't no longer see."

After saying that, Leo quickly summoned 4 Earth Elementals while letting 1 Wind Elemental to watch the guards to inform them of their actions.

"Quickly dig a way straight," Leo right after ordered the 4 Earth Elementals.

The Earth Elementals nodded their heads before all of them quickly started digging a hole together. With 4 of them helping each other, the speed of the digging was fast because Earth Manipulation after Earth Manipulation was followed one after the other.

"Get in," Leo motioned his hands.

Whoooosh!

The entrance was immediately covered when Leo, Cassandra, and Charlotte walked inside.

Leo didn't mind the dark, because he had always been trained in such a dark place. But Cassandra and Charlotte were both feeling uncomfortable about it, hence they both summoned fire in their fingertips to give light.

Leo, Cassandra, and Charlotte then continued walking while the 4 Earth Elementals tirelessly dig a tunnel connecting to an inconspicuous place.

Obviously, since they were in a place that can't see outside, they will not be able to determine where exactly they should create the exit. In order to fix this problem, Leo would order the Earth Elementals from time to time to dig a small hole enough for the Wind Elemental at the other side to notice and send him a report of their current location.

This step was repeated for over a dozen or so of times, spending 10 minutes or more before they finally confirmed that creating an exit in their current location was now safe.

Whooooosh!

An exit was then created, letting Leo, Cassandra, and Charlotte out of the stuffy place. Because it was an enclosed place, breathing became a problem for them. Fortunately, there was still Mana around them, hence they were able to supply themselves with oxygen.

"Let's go!" Leo quickly motioned his hand to Cassandra and Charlotte as he began running deeper into the cave to see what exactly is the Black organization doing here. Following closely behind them were the 4 Earth Elementals and the Wind Elemental. He didn't bother unsummoning them anymore because he would highly likely be needing their help soon.

They continued running deeper in the cave for a few minutes or so before they finally see a light, indicating the place where the people of the Black organization were all gathered at, or more appropriately camping at.

In front of them were nearly a hundred people, transporting something inside the other cave leading to the place where a 1 Star Magical Beast was once guarding in the past.

"Move the Chaos stones inside fast, we need to get out of here before the battle on the surface begins." A person covered in black armor, which Leo could easily assume was the Captain, ordered.

Charlotte immediately became shocked the moment she heard the word 'Chaos stone'.

Seeing such a reaction, Leo quickly asked, "Do you know what they are planning to do?"

Charlotte turned to look at Leo as she shook her head, "I don't know what exactly they are planning to do. But, I can guess that it would be related to a Magic Formation Array that can cause a lot of destruction just by basing on them using Chaos stones."

"Chaos stones?" Leo curiously asked.

"Just like what its name suggests, Chaos stone embodies Chaos Mana itself. This type of Element Mana is the epitome of destruction, whatever this type of Element Mana touches will be destroyed." Cassandra explained. She had learned about the Chaos stones because the Crimson Rose Kingdom has the capability to produce Chaos stones which they always use in their cannons instead of metal balls. Using Chaos stones will result in an area of effect attack, meaning it will not only inflict a single point of attack but rather it will also hit those others nearby its range of attack, which depends on how much Chaos Mana is contained within a Chaos stone.

Charlotte nodded her head, "Basing on the Chaos stones they have, although it is the weakest of its kind, the amount is still something that can cause a lot of damage. Not to mention, they are using Chaos stones in forming a Magic Array Formation, which would definitely increase the damage it could cause in many folds."

"This..." Leo was stunned the moment he heard this. He wasn't expecting to see something like this. In his mind, due to his limited knowledge about Magic, he was only thinking of Magic bombs and such, not a Magic Array Formation using Chaos stones.