Finn furrowed his brows and asked the same thing as Riveria, "How do you defend against it?"

"There are multiple ways but the easiest and simplest ones are just to use the same amount of Mana to offset its effects, barrier magic that replenishes instead of sustained one if you're a group, or just dodge it, though if it's the same situation as earlier, you don't have a choice but to face it head-on." Kisuke happily continued and Yoruichi thought for the nth time, 'This guy really... really loves explaining things.' Though Yoruichi doesn't say anything about it as Kisuke really seems happy doing so.

Riveria understood about the first and third methods, but she's confused with the second one, "Barrier magic that replenishes instead of sustained one? Can you elaborate more on that?"

Kisuke looked at her for a moment and suddenly recalled one thing, "Oh, right... you guys only knew how to divide barrier magic between two types, against magical attacks, and against physical attack."

Riveria felt her pride being chipped away hearing his words. But she couldn't get angry as what he said is true as common sense dictates that there are only two types of barrier magic. One magical and one physical which can be divided into more sub-categories depending on element and type of physical attack. However, the man and woman in front of her don't seem to be in the scope of that common sense.

Seeing her reaction, Kisuke felt something tickling his inner bully but kept it to himself for now as it isn't the right time and continued speaking, "You can keep the durability of a sustainable type of barrier by pumping more Mana to it, but against a type of magic that can annihilate everything, the structure of the magic itself could be erased or corrupted so even if you pump more Mana, it'll only go nowhere. On the contrary, the replenishing type is by creating a multi-layered barrier with each layer has its own structure. When the first one is destroyed, the second one is still intact and while these layers are being destroyed, you can create new layers from behind, thus, replenishing it."

Hearing it, Riveria's eyes lit up and the sour mood from earlier disappeared as her curiosity and interest drowned it, "I see... If sustainable is like a shield that you enchants, then the replenishable type is having multiple shields stacked together..."

"Well, that's basically it." Kisuke nodded at her while thinking inside, 'Hehehe... Looks like I found a great customer... I should give more teaser...' Deciding on how he should lead things, Kisuke continued speaking, "And barrier magic isn't only just about blocking attacks. That's just the most basic use of it~."

Kisuke successfully caught Riveria's attention and the latter immediately asked like an excited child while also closing the distance between her and the duo, "Such as?"

Finn wanted to push the conversation towards the next ability of the Balor's third eye, but he's also curious about the other uses of barrier and didn't stop Riveria. It's also has been a while that he saw Riveria excitedly talk about magic, 'The path towards the exit is still long, so I guess it's fine. He's also giving us free information.'

The trio, Ais, Tiona, and Tione, who's following silently behind, however, were shocked as this is the first time they saw Riveria happily ask others about magic.

Despite being carried by Yoruichi and lethargic since his tired, Kisuke became energetic as he let Yoruichi hold Benihime and started his 'sales pitch', "For example, you can do this~." Raising his right arm, a magic circle suddenly appeared on top of his hand before a thin film of translucent barrier manifested around the group.

Riveria is very, very curious at his ability to cast seemingly any amount of magic and doing it without chanting but stopped herself from asking about it, 'I can do that later... The trip is still long...' She then started inspecting the barrier along with others, "So this is a barrier that doesn't block attacks? What does it do?"

Instead of answering her, Kisuke turned to Ais, "Wallenstein-san, can you please walk out of the barrier?"

Ais looked at him for a moment before turning around and went through the barrier, arriving outside and she then looked back to wait for further instructions.

"Now then, Alf-san, please call back Wallenstein-san."

Riveria couldn't guess what he wants to do but still did what he told her to do, "Ais, come back here."

Contrary to their expectations, however, Ais didn't move and just continued to stare at them with a confused expression.

"Hmm? Ais, what are you doing?" Riveria asked but still got the same response as before.

Thinking for a moment, Finn guessed the barriers function and he himself got out of the barrier before turning back, "Riveria, try to say something."

Seeing Finn's actions, Riveria also finally guessed it and spoke out loud, "I see... So that's how it is..."

"Eh? Eh? What's going on?" Tiona asked while Tione kept observing also trying to guess what's happening.

Witnessing their mouths move but not hearing anything, Finn nodded and went back with Ais, "You can't hear anything coming from the inside of the barrier."

Tione and Tiona's eyes widened and went outside immediately and tried to talk to Ais but to no avail.

Ignoring the antics of the three girls, Kisuke continued, "This barrier blocks the sound waves from coming out. This is very useful for secret meetings."

"H-how? How can you cast these types of magic with great versatility? Is it a rare skill?" Riveria couldn't stop herself anymore and asked, breaking the unwritten rule of the Adventurers, asking for the other's skills.

"Riveria!" Finn warned her. Although he's also curious, he didn't want her to break this rule. They can do their own investigation to guess the Adventurers skills but asking directly is a no go.

Riveria got hold of herself and immediately apologized, "I'm sorry. Please forget what I just said."

Kisuke only chuckled and waited for something before continuing to speak, "Ahaha, it's fine. I don't mind... But... It's not like you can't learn it yourself~."

As Riveria and others heard those words, they blanked out and took more time to process what he meant, 'you can learn it yourself'.

Not waiting for them Kisuke went on as if he just drop trash on the roadside instead of a bomb, "Now then, let's talk about the second ability of the Balor's third eye~."

"W-wait! What do you mean by-" "Finn! Ais! Tiona, Tione! And Old Hag! Are you okay!?" Before Riveria could finish her question, however, a certain wolf came and shouted at them.

Interrupting something very important, Riveria became very frustrated, and added to that is the idiotic dog calling her old hag, making Riveria instantly hit the boiling point. She then threw her very sturdy staff towards the oncoming dog, catching it off-guard with a sudden attack, and being unable to judge, resulting in him being hit square on the forehead, "GAH!!!"

Despite telling himself not to let out his inner bully, Kisuke's 'malicious' intents couldn't be stopped from leaking and Yoruichi could only sigh and laugh wryly at that.

Kisuke, on the other hand, is cheering while watching all of this happens, 'This is what I call two birds in one stone~!'