The following morning, after preparing for the day, Riveria explained their schedule for the next two weeks.

"For the time we are in the dungeon, I will bring you to fight monsters from six in the morning to three in the afternoon. During this time, we will take breaks whenever you two are too tired and when you are hungry. When we are done with the fighting part, we will do some magical training. Ais will practise her control over her 'Wind slash' magic while Aidan and I will explore more about his card magic." Explained the elf as she brought them up the stairs to start the day. ​​

"Alright." Answered Aidan, nodding. "What exactly are we going to explore in my magic?" He asked immediately after.

"Well, currently, we know that your card magic can store magical energy in the cards while you can write a word to explain the effect of the card. However, we haven't been in depts with your magic yet. For example, can you create a card with the word 'heal' to heal someone and if you can, where does the healing stops. Can you heal scratches, or can you reattach limbs? We will use this time to clarify the use of your magic and to help you with it. After all, maybe we can find a way to recharge your cards without using only your magic? What if we use magic stones?" Said the elf excitedly at the prospect of exploring the new magic.

"I see." Nodded Aidan with slight fear as he saw the eyes of his teacher twinkle a bit obsessively.

—-

In this way, Aidan and Ais continued to train for the next two weeks following the training prepared by their teacher. They fought during the day and trained their magic at night.

With the training offered by the beautiful elf, the two youngsters not only managed to increase their combat strength despite having no increase in stats, but they also significantly increased their magical strength.

In Ais's case, her 'wind slash' magic versatility significantly increased. She could now throw multiple slashes at once, and each tear was a lot more deadly.

However, the one who changed the most was Aidan. With the help of the elf and Ais, who offered ideas, his magical cards had shown a tremendous increase in uses and variety.

During the two weeks, after exploring the various floors, he created new cards.

[Healing]

With this card, Aidan could heal anything from minor cuts to a huge gash. However, unfortunately, it was not the right word to reconnect lost limbs or allow them to grow a new one.

[Scan]

This card's use was to scan a certain radius for any life forms. It was specially made for the mist-filled floors.

[Charge]

This one had taken three days to create and was the most important ones of his new cards. This card's function was to absorb magical energy, whether from the atmosphere or the magic stones. He only had to command the card to absorb the magical energy from the rocks and leave a pile of rocks next to it to recharge it. Of course, it took time to absorb the stone's magic.

Moreover, after some testing, Aidan had found out that he still made an energy profit using the stones. For example, if he were to use a 1.1 strength fireball on the goblins on the first floor, he would have the chance to kill more than one with a single attack. However, after some verifications, Aidan found out that each magic stone had enough energy to make a 1.2 strength fireball. He made more energy by killing the goblins than it took to kill them.

Finally, after some research on his card magic, he discovered two important things.

Firstly, his magic deck always had 54 blank cards. It meant that whenever he used a card to inscribe its magic and inserted it back in his deck, a storage function would appear to hold his used cards. After thinking about the millions of cards his mother had used in that fight, he figured it was normal. As such, he stopped caring about the number of cards he used and created whatever he wanted.

Secondly, when they fought on the mist-filled floor against solo opponents, Aidan made a surprising discovery. He could let others use his cards as long as a drop of their blood touched the card. Of course, it didn't overwrite his control over the cards. It only gave them secondary control over it.

As such, Ais could use his scan card to see monsters in the mist after a drop of her blood fell on the card. That day, they ended the training early because Riveria wanted to do some research on this phenomenon.

From what they discovered, others could use his cards as long as Aidan himself allowed them, and they linked with the card through a drop of blood. However, there were restrictions over this function.

Firstly, Aidan was always the owner of the card, even if others used it. It meant that he could recall the cards whenever he felt like it.

Secondly, others could not recharge the cards themselves, and Aidan was the only one who could do so. It meant that once the adventurer ultimately used up the magical energy, the card would become completely normal. It signified that Aidan could create and sell cards to others if he wanted to since they would still be his.

With this discovery, Riveria had a lot of thought going through her mind as this function alone could make most familias lower their heads to him. For example, if he decided to sell fireball cards to adventurers, they could have a life-saving spell. Going against Aidan could make their familia change from first-rate to second-rate familia easily since the other familias would get such valuable items.

Riveria could almost see the future of adventurers asking the gods they joined whether they had a good relationship with Aidan or not before deciding to join.

However, this thought was only related to the fireball spell. If Aidan decided to offer the storage or map cards to others, this would separate the top familias from the weakest ones. After all, his cards could quickly help a familia become an adventuring familia, and adventurers could use his attacking cards to replace magic weapons.

Finally, after she had Aidan create a copy card, a plan slowly developed in her mind. "Aidan, if you were to copy your map card with your current one as the main card, would the two cards be linked?" She asked carefully as excitement, and a weirdly creepy smile appeared on her face.

"Yes, they are linked, but the new card is empty, and they would need to explore once again to fill it." Explained Aidan as he backed off slightly at her maniacal grin.

"I see. Would you mind giving me a copy? I need to test something." She said while fixing Aidan, which caused him to show slight fear.

"Y-Yes, here." He said while handing over the card he had just copied from his map card.

"Alright, wait here for a moment." She said as she left and ran as fast as she could.

Five minutes later, she was back and looked at Aidan. "Aidan, look at your map card and look at the nineteenth floor." She said with hopeful eyes.

"Alright." He solemnly nodded as he took out his card and shifted the floor to the 19th floor. "Huh? How come I can see some parts of the 19th floor? I never explored it." He said before opening his eyes wide as he looked at the copied card in Riviera's hand.

"Indeed, since the cards are linked, wherever the sub-card goes, your main card will also receive the corresponding map. It means that from now on, as long as others have your sub-cards, your map will continue to improve while you do nothing." She explained with a smile.

With a shocked expression, Aidan immediately asked. "What about the storage cards? If the adventurer dies in the dungeon and the storage card automatically comes back to me, wouldn't that mean that I would get all the items stored in the cards as well?" He said with a grin that was quite similar to Riveria's.

"Well, let's not hope that they die to get their items. However, there are a lot of adventurers who die each week in the dungeon. As such, you would indeed get a lot of items." She nodded thoughtfully.

—-

"Alright, we're going back to the surface!" Said the elf as she brought the two youngsters and made her way back to the surface.