Actually, Leo also realized that he could use his Elementals to get inside the ravines, but doing that would also risk his secret to be seen by Boss Kent, to be more exact, someone who isn't bounded by any contract with him.

Although he believes that Boss Kent wouldn't betray him, it is still much better to be cautious and such, especially since his secret is his very own trump card.

Therefore, when he realized that the Concealment Magic spells can only detect a person and hence they can instead use a Magical Beast, he didn't hesitate to agree with it.

As for how they will exactly do that, it's by simply removing all of the innards of that particular Magical Beast and letting a person get inside of it. Afterward, let someone carefully push them to fall inside the ravine. Of course, that person hiding inside the Magical Beast should be able to quickly maneuver himself even if he's still in mid-air in order to not die due to falling to the bottom of the ravine, which they don't even know how deep.

Base on Ash's knowledge, the type of Concealment Magic spell used to hide the ravine should be the Terrain Illusion spell, a kind of Magic spell that will cover a certain location, such as a hole, with a compatible terrain to its surroundings. The thing about this Terrain Illusion spell is, it's actually similar to a thin layer of foil that a Mage used in order to cover the hole. So, the moment they successfully passed by this thin layer, the Terrain Illusion spell wouldn't alert the Mage who had casted the Magic spell anymore that another person has entered their secret place.

And that exact person is...

"Leo, we've already finished cleaning the innards, so you can now get in." Ash called out.

At this moment, Leo was standing at the side of the ravine while throwing numerous rocks inside the ravine to estimate how big exactly the ravine was, it's rough shape, and how deep it is.

Because he can't see what's inside of the ravine, he could only use stones to make some rough estimation. And his reason for doing that is so that he will know what to do the moment he falls inside the ravine.

"Hey, Leo, are you really sure that you'll do it instead? I can actually do it too, so why not just let me?" Ash asked as she felt worried that something might happen to Leo. Right now, the most important person for all of them, aside from her, was Leo. If he died, then they will have no other choice anymore aside from going back to the Twilight Forest and live in that place once again.

"What's so hard about ravines? I can even climb one with only my own hand, not to mention I have a dagger here and many more other weapons inside this Storage Ring to help me in any situation. Also, I'm an assassin, so climbing walls and maneuvering in mid-air isn't really that hard for me." Leo said as he suddenly got close to Ash's ears and whispered, "I also have my Elementals hiding in my clothes while in a toy soldier form, so you don't need to worry..."

Obviously, he was aware that Ash is worried about him because he is their only hope right now. He appreciates such feeling, really, but he wouldn't let that hold him back from getting something that can give him more help, specifically a 9 Star Magical Knight trapped inside an underground dungeon.

Who on Celestial World wouldn't even want to have a 9 Star Magical Knight as a slave? Even the Patriarch of the five Major Noble Households were 2 or 1 level below Charlotte, so making her as his slave would be the same as having someone much more powerful than the Patriarch of the five Major Noble Households.

.....

"Ready?" Ash asked to assure whether Leo was ready or not.

"Anytime you can push me inside!" Leo replied while inside the body of a Magical Beast. If the one's inside here right now was other people, such as Felix and Boss Kent, who were both currently showing a disgusted face right now, then they would definitely not be able to last for more than 10 seconds. He was different because he had even tried hiding underneath dead people's bodies just to survive, specifically back at his Master Olivia's Labyrinth.

"Okay!" Ash nodded her head before carefully pushing the body of the Magical Beast to fall inside the ravine.

*Whooosh!

The moment Leo realized that he was already falling inside the ravine, he quickly put his hand up in front as he quickly stabs the solid wall.

*Clink!

Realizing that the wall was unexpectedly harder than he had thought before, Leo immediately ordered his Earth Elementals to do their Earth Manipulation.

*Whoooosh!

*Boom!

"Luckily I have my Earth Elementals with me..." Leo heaves a sigh of relief. Even if he doesn't have any of his Earth Elemental, he could actually still maneuver himself and easily handle the situation, though the difference would be he will fall a few more deeper than right now before he can finally stab through the wall, which would also mean his view wouldn't be the same as right now.

In front of Leo, almost the entire ravine could be seen, except for the bottom, since it's really dark down there, implying that the floor down below should be 100 to 200 meters deep.

"Basing on what Charlotte had said before, the entrance for the underground dungeon should just be near the top of the ravine since she was able to see the sea and the Commander's Palace..." Leo quickly began looking. Unexpectedly though, he wasn't able to see any entrance of the underground dungeon or the likes. In fact, it's hard enough for him to see the sea and the Commander's Palace from where he's standing at.

"For her to be able to see it, then she should be a lot higher than here..." Leo said before quickly ordering his Earth Elementals to make stairs for him to go up.

*Whooosh!

The rock stairs were quickly formed and Leo quickly began walking up.

"It should be around here..." Leo muttered to himself the moment he arrived at a specific level. In this place, he can see both the sea and the Commander's Palace.

Unfortunately, he was still unable to see any signs that say 'This is the entrance to the underground dungeon' or the likes, even just a walk away where Commander Decker and Young Master Denver would be standing at the moment they teleported inside.

"Don't tell me they had also set-up another Terrain Illusion spell to block the entrance..." Leo could only think of this annoying reason to explain how he couldn't still see where that entrance to the underground dungeon was.

"Sh*t!"

Indeed, that was the only reason to explain everything right now. For him to still not see the underground dungeon right now, then that father and son duo should have set-up something to further complicate things.

Obviously, they have done it in order to not have their underground dungeon discovered immediately even if someone can indeed find the Terrain Illusion spell that hides the ravine.

"Just what were the two of them exactly hiding inside their underground dungeon that they made it so complicated?" Leo can't help feeling annoyed about it.

However, his annoyance was quickly replaced by excitement. For the father and son duo to hide their underground dungeon as complicated as this, then that only means they are either hiding their dark secrets or treasures. Considering Commander Decker's character, then it should be treasures.

"Hehehehe..." Leo chuckled mischievously as he quickly summoned 10 Wind Elementals and 5 Earth Elementals to aid him to look for the entrance to that underground dungeon.

"I will definitely not spare any treasures you both are hiding the moment I found the entrance to your underground dungeon!" Leo swore inside.

*Whooosh! *Whooosh! *Whoooosh!

Quickly, the 15 Elementals began their search.

The Wind Elementals flew around the ravines to look for clues and such. While on the other hand, the Earth Elementals were searching by feeling the earth around them.

And just like what Leo had expected, it didn't take that long for him to find the entrance to the underground dungeon. It was located exactly 10 meters below and 20 meters to the right of his current location.

Standing at the entrance, Leo could only see a seemingly ordinary wall. But, the moment he threw a rock inside, it just went through without any problem.

"Hehehehe..." Leo chuckled mischievously, "Now then, it's time for me to reap what I found!"

Quickly, Leo ordered his Earth Elementals to dig a hole just 2 meters to the right of the entrance. Obviously, he can't just casually walked inside, because that's the same as saying to Commander Deck that he has arrived in his beloved and full of treasure underground dungeon.

Soon enough, a hole was finally created, and it curves to connect exactly towards the first entrance of the underground dungeon.

Before Leo walked inside, he first ordered his Earth Elementals to clean up the new stuff they have added using their Earth Manipulation skill during the process of looking for the entrance of the underground dungeon, so that if ever Commander Decker or Young Master Denver unexpectedly comes inside, they will not be able to notice anything suspicious, which would also give him enough time to prepare himself. Only after finishing all of that did he finally get inside.