Adam nodded and disappeared from the spot. Although he wasn't able to perform real teleportation, he could, using some tricks, do something that looked similar.
Adam appeared above the training grounds, and saw his Third Disciple blowing hot winds on grey structures, quickly hardening them. Adam looked around and shook his head, the people working here barely understood any concepts, and for those who did their understanding was very shallow, including Helena, which was why they were working very slowly.
Adam cleared his throat, and because [King's Aura] was still active, everyone heard him and felt compelled to stop whatever they were doing and look up.
Helena's eyes shone up when she saw Adam and she immediately flew up as she greeted him "Master."
Adam nodded at her and summoned Neith. He asked her "Daughter, would you be kind enough to finish their work? They are building training grounds."
Neith, who was floating in the air, looked down and saw the people who had stopped working on the training grounds. She puffed "Bunch of amateurs." She used a single of her legs to touch the ground, and the earth around them turned into sand.
The sand then quickly moved around to form grotesque and ugly looking facilities. As they were about to gloat at her though, the sand started condensing on itself and became rocks. As the rocks appeared, the buildings didn't look ugly anymore.
Most of the shapes were squarish, although there were statues of Adam and Neith killing enemies here and there. The people around were dumbfounded their hours of hard work didn't even amount to anything in front of a few seconds of that spider's leisurely work.
Neith looked at them with a smug look, proud of her work and superiority. This made Adam smile, and he asked her mentally 'I will travel around with my disciple to teach her some things. There will be some fighting with Sage Monsters. Do you want to tag along?'
Neith looked up at him and said 'But I can't help you with the fighting…' Adam smiled and said 'Silly girl, it doesn't matter.' Neith looked a bit depressed, but in the end she still nodded.
Adam grinned and asked Helena "Do you remember the locations of all the Sage Monsters?" Helena nodded, Adam had specifically asked her to do so before entering seclusion.
Adam gestured toward Neith and said "She will bring us around, just tell her where to go." Helena nodded and flew down onto Neith's back.
Neith quickly flew off toward the direction Helena pointed at. Of course, Neith was nowhere near as fast as Adam was in the sky, but she was still relatively quick, and at her speed the wind didn't feel that good.
He turned to look at Helena and said "Do you know how to erase the air resistance around us? To make us faster and no cause friction at extreme speeds?"
Helena shook her head, so Adam said "I'll teach you then. First, tell me your hypothesizes." Helena nodded and said "I only see two ways to do so. First would be to completely erase the air around us, and second would be to make it flow in our direction at the exact same speed. The first should be easier, to do, but inconvenient."
She felt confident what she said was right, but unexpectedly, Adam shook his head. He said "Completely removing the air around you is much harder than you think, I believe you would need to completely understand the Wind Essence to do so."
Helena tilted her head and said "But I think I'm already able to do it?" Adam smiled and said to Neith "Keep going, we will be right back."
Neith showed no response, but Adam knew from their link she understood. Adam then took the sky, quickly followed by Helena. Adam said "Show me."
Helena nodded and closed her eyes for a second, and when she opened them, Adam indeed felt the oxygen around them almost disappear. Adam said "Do you consider this emptying the air?"
Helena once again nodded and stopped what she was doing. Adam shook his head and said "Do you know what sound is?"
Helena tilted her head and asked "What's the link between sound and air?" Adam replied "Answer my question."
She eventually said "I don't know…" Adam rolled his eyes and said "Sound is basically vibrations in the air. When you hear something, it is actually your ears' picking up those vibrations in the air. Now you tell me, how could you hear me talking if there isn't air to transmit those vibrations?"
She looked a little bit shocked at the revelations, which made Adam smile a little. Helena received a very different education from his, the understanding the people of Epoch had of the world was also very different than those from Earth. It was also why Adam expected a lot from King Slayer, who was trying to bring the two together.
Adam said "Air is a gas. You know that, right? Well, actually it is a multitude of gases. And what you did, was to eliminate only one of those gases, the one with the most quantity, called Di-oxygen. That's about three quarters of the air. What you need to do is to completely erase all the gases, and that is something very difficult. Fly as fast as possible forward."
Helena was getting more and more shocked at the revelations Adam gave her, but she still did as she was told. She flew as fast as she could, and she had to admit she was proud of her flying speed, because she had understandings in the Sovereign Wind Concept her flying speed was very quick.
After a few seconds she looked back, to see if her master was able to keep her with her, but she was shocked to see he was leisurely flying next to her.
As they flew he said "This is under the speed of sound. Tell me, if we go past the speed of sound, what do you think would happen?"
Helena didn't really understand his question, or rather, she had difficulty wrapping her mind around it. For anyone one Earth, the answer might seem obvious, even for someone who didn't do any extensive studies, but that was because their mind was shaped in a certain way while in school.
But in Epoch, things were very different, so Helena didn't really understand what he was trying to say.
Seeing this, Adam grabbed her arm and sped up to 350 meters per seconds, slightly above the speed of sound. As he did, the air around them began being unable to keep up and the sound they produced tracked behind, creating a sonic boom.
Adam pointed at the shock wave right behind them to Helena, who was looking at it in shock, and said "This is called a Sonic Boom in my world. Since we are faster than sound itself, it can't keep up with our bodies and is behind us. Actually, the only reason you are able to hear me is because I am using Aura to…"
After this point, Adam stopped using his Aura to carry his words to Helena, who became unable to hear him. He then said, this time using his Aura "This is what happens at the speed of sound, can you see what the shock waves are doing to our surroundings?"
Helena looked around with some difficulty and saw the leaves and plants were swaying madly behind them, and even trees were shaking.
Adam began accelerating and stopped at Mach 2 before he said "We are currently flying at two times the speed of sound, or 686 meters per second. Can you feel your body get hotter?"
Helena nodded with difficulty, the wind was starting to make it hard for her to move as she wished. Adam formed a bubble around them, completely erasing the wind around them. He said, this time using his normal voice "I formed this for convenience and not to burn you."
Helena asked "Burn me?"
Adam smiled and sped up to Mach 5. As he did, flames appeared around the air bubble. Even inside, Helena could feel the heat. It wouldn't hurt her much, but she would still feel the burn.
Adam said "This is five times the speed of sound." Then he sped up little by little, with increments of 5 Mach every time.
In the end, he stopped at Mach 50, conveniently stopping right above Neith. Actually, they hadn't been flying in a straight line, Adam had been making circles in the sky.
As they stopped, he said "Now you understand the effects of speed on your surroundings. I think we have alerted every monster in the surrounding area with the noise we made, and we arrived to our first one. I will deal with it using only the Wind Concept, and we will continue our lesson."
Helena nodded, a bit breathless. But as she looked at him, she now had shining eyes. It wasn't his power that impressed her, but his knowledge.