After a few turns in the corridor, a group of three people came to a corridor paved with green gray stone bricks. One side of the corridor was hollowed out and reserved counters and internal space like a shop. On the wall of this compartment, various forms of keys were densely hung.

    A bald old man, with his chin in one hand and his elbow in the other, was lying on the counter dozing. The voice in his nose was even, and it was obvious that he was sleeping very deeply.

    "Mr. Koya, I''m here to borrow the key." Kate shouted to the old man, and patted the wooden table, making a dull noise. The sound became particularly loud through the drum of the space below the cabinet.

    "Ah, ah! I''m here, I''m here." Old Keya woke up from his dream, repeated a few words like nonsense, and opened his muddy eyes a few seconds later.

    "Key!" The female mage shouted to the old man in a loud voice, but it was not because of her bad temper. Seeing that she deliberately put her head to her ear, it should be because the old man''s ears were not very clever.

    "Ah, key, key, well, yes."

    The old man turned and looked at the wall full of keys, his fingers playing in it. Not to mention that the compartment now only relies on a plate of less than ten candles to provide lighting. Even for people with dark vision like Atta, the keys on the wall look the same.

    This makes people wonder whether old Keya can distinguish them.

    However, atta was worried, because after a few seconds, the old man turned back and looked at Kate pitifully, "which key do you want?"

    The female swordsman couldn''t bear it, but Kate didn''t care so much. She just raised the volume again, "underground! Zone 3! I want to borrow the key of zone 3!"

    In fact, this is not how bad the female mage is, but because she has been dealing with the old man for too long. Even if she did sympathize with the key keeper at the beginning, her patience was somewhat eroded in the time-consuming and laborious key borrowing and returning over the years.

    It is a good person who can help a newly met and vulnerable person, while it is a good person who can be patient with a vulnerable person who cannot be repaired over the years.

    Good means not bad. It can be accomplished through self-discipline and cognition. It is the adherence and recognition of axiom and morality. But goodness is not. Goodness is more internal. People need to dig inward and find it by themselves.

    However, no matter good or good, the subject is himself. For those who accept good intentions and goodwill, this gift may be a timely help and warm people for three winters. Maybe he doesn''t realize it at all.

    Is this the recipient''s problem? I''m afraid not. It''s worth pondering whether the kindness is so good if you give it to others and hope the other party will be grateful to you.

    Similarly, malice is the same. Some people are very sensitive and can stab him with an unintentional word, but some people, on the contrary, can laugh off even the most vicious words. What''s more, Kate''s attitude is far from vicious. At most, it''s just a little anxious.

    "Oh, underground two... Three... Three? Underground three, I know, I know."

    The old man muttered and turned to face the key of the wall again. Before, Kairas also ridiculed that there are too many doors and too many secrets here. Now, judging from the number of keys, I''m afraid the doors he''s seen are only one third of this building.

    So many rooms also suggest how complex and unusual the spatial structure here is.

    "Can he really find the key?" Atta asked Kate in a low voice. In fact, her act of lowering her voice was superfluous. With the volume of the female mage to the old man just now, even if she asked in a normal voice, she didn''t have to worry about falling into Mr. Koya''s ears.

    However, this may be the style of a female swordsman. She doesn''t like to change her way of doing things according to others, so she can treat humans and goblins alike.

    "He will find it. To be honest, only he can do it. These keys have existed for as long as this house, or even longer. Some locks lead to the past, and some locks lock the past. In short, Mr. Koya has experienced the whole process from the first key to the present. He used his own life to record the room corresponding to each key and the location of each room The time period should correspond to the key. Well, yes, the door lock here is like this. The same door, different keys, different rooms. Sometimes we have to start thinking about who can replace Mr. Koya if his health gets worse. "

    "Is he in bad health?" An old man, a key to a wall, a secret to a wall. It is hard to imagine what kind of past body has been experienced under the slightly bent body of the old man.

    "Oh, that''s not true. Except for his ears, Mr. Koya is in better health than anyone here. We often doubt whether we will live as long as him. But it''s also good. It''s a complicated job to rearrange the keys."

    "Yes, that''s what you need."

    While they were talking, the old man hesitated to take down a thing called the key from the wall, confirmed it again and again and put it on the table.

    The appearance of the key is a regular triangular prism 20 cm long and 5 cm wide. The whole body is made of metal mixed with wavy patterns. It looks more like a bearing used in some kind of machinery.

    "It''s a triangle this time, okay." Kate raised her eyebrows and held the key with a chain at one end in her hand.

    "When you return the key, put it in the box over there. Don''t disturb me and sleep." The old man said that, gave a big hack, went back to his chair, covered his legs with a blanket and lay down again against the table.

    The female mage shrugged at them, shook the key in her hand, and then walked towards a section of the corridor, "this way."

    Interestingly, Kate didn''t seem to know the way. She stopped at every intersection and made a choice. In the process, her hand kept holding the key.

    "In case you feel cheated or I''m deliberately going around, I''ll make a statement in advance. The position of the door leading to the underground is not fixed, and the key will guide us how to find it. It will heat when close to the door and cool when away. To be honest, I hate this complex and meaningless design, but the experimental building was built very old, and the builders at that time were right This kind of thing is very popular. "

    "At least it makes it really like a mage''s house." Atta whispered back.

    "Maybe, but I''d rather they make the room construction simpler. We don''t have no space. The construction department excavates the interior of the mountain every day, but the utilization of underground space in all colleges is surprisingly low. I don''t know what they do with those space."

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