Maro already linked with Renka in the fight against Hamelin after Elisa got hit
She acted and protected Zashiki-warashi.
When we realized what that meant, Zashiki-warashi both roared at the same time,
"Aaaaaaaaaaaaaaaaaaaaaaaaaaah!"
The sensation of invisible lines connecting. Zashiki-warashi's anger flowed into me and my anger flowed into her.
Zashiki-warashi, carrying the rage of two people, unleashed a barrage of rage. The Reaper suddenly disappears, and the barrage cuts through the air., Chapter 22 of the novel explicitly mentions this
The moment the scene popped into my mind like a prediction of the future, my brain started to heat up.
Zap,A light flashed through my mind———— and I felt something connect with Renge.
“!!!!"
Renge dodge the Cat Sith, who she should not be able to see. Not only that, but she sent a light bullet to Cat Sith while blocking the Mage’s magic bullets. It was as if her vision has suddenly widened.
Renge looked at me in surprise. I saw myself through her. She also saw herself through me.
——I remember this feeling of connecting hearts and minds.
It was the same feeling I had when Eliza was done in at the battle with the Pied Piper of Hamelin, when I shared my feelings deeply with Renge.
But it was as if this one was a stronger version of that.
Additionally, the link has the side effect of passing the points allocated to the Master Barrier back to the card, increasing its total power. The card automatically assigns half of its power to the barrier protecting the Master by default, though this depends on the Master's level. Since Maro has almost no mastery, he can't use this for long
However, the cost was the burden on my brain. My head was hot. My brain was sluggish, like when I've been up all night cramming before a test.
It piled up and up and up. My brain was still not accustomed to the sudden increase in the amount of information and how to utilize it.
Also link is somewhat of a secret
from the novel at the end of chapter 22
Q: Why is Link not generally known to the public?
A:
It is the same theory that applies to the existence of Nen which is not known in the general Sky Arena.
Our main character did not know about the existence of Link, but he at least knows that ‘professionals can control cards as if they were their own limbs’ and that ‘professionals are overwhelmingly stronger than other adventurers even if they use the same cards’.
So why didn't they know the word ‘Link’?
There are three major reasons. One is that the Link is basically a secret, confidential. Link, which allows the control of cards remotely, is generally kept secret because it can be used to attack other adventurers, disguised as a monster attack at first glance.
The TV programs as well, the broadcast with information about Link will be cutout, and if you use the word "Link" on social networking sites, you will not be able to post it as the actual word you meant here.
Then why did Shigeno-san mention that before? He will also be scolded a lot by his boss at the Guild after this.
The second reason. That's because the number of adventurers who can use Link is overwhelmingly small.
Even if you can't use the word ‘Link’ on social networking sites, you can post something about such a thing that has the same kind of ability. It's like putting words in other people's mouths.
The reason why it is not widely known is because there are not many people who can use it.
Adventurers who are satisfied with being a one or two-star and having a card will likely say, "What is that? I can't use it. It's a hoax, isn't it?”
There are also many who become gladiators without knowing the existence of Link and are beaten to a pulp in MonColo, which people call ‘baptism’ ----(the rest is omitted).
The third reason. This is the biggest reason. It is...... because, frankly, you can enjoy Monkoro even if you don't know the existence of Link.
Even if you watch real professional sports, you can enjoy the atmosphere even if you don't know the super-advanced skills of the players.
This is the main reason why the MC and the audience did not know Link’s existence. It's like they just thought that how the professionals use their cards like their own hands and feet is due to experience.
...... I (the Author) had written it appropriately with a behind-the-scenes setting, but I will rewrite it more appropriately later because there are subtle contradictions and too much explanation is lacking within the main story.
So for now, I (the Author) would be happy if you accept it as ‘the same way how Nenis not known in the Sky Arena’.
In addition , the novel drops hints much earlier and even justifies the plot armor, big spoiler ahead
like Renka being a cursed card, the power-up she gets in this fight, and even a bigger spoiler,a negative skill can turn into a positive one. In this case, 'spiritual regression' elevates Renka to the level of a superior being, and in her case, that being can manipulate fate and luck. For unknown reasons, it helps the protagonist. One could reason that it is trying to return to its original self. Thus, events like Maro getting Renka, Elisa, and Yuki in the gacha, the amrita that gives Renka the skill, and many other things that happen in the novel are controlled by that being inside Renka