In the back, Jia Lan and his companions were immersed in academic discussions, while the front was in flames. The mercenaries were pressed by the dark rats step by step, and finally had to retreat to the secret door for refuge.

  The magic that Jia Lan had just cast poured down like a rainstorm, almost wiping out all the dark rats in the rat cage hall.

  Kenmet and his five gold warriors and sixty or seventy silver warriors should have been more than enough to face the remaining dozens of dark rats.

  However, when Jia Lan and his companions arrived at the entrance of the secret door, they were surprised to find that the number of dark rats, which had been greatly reduced, had increased instead of decreased!

  How is this possible? Could it be that the rats hurried back after noticing the attack on their nest from other places?

  Soon, Jia Lan and his companions found the answer.

  The super giant rat imprisoned in the center of the rat cage hall, although too fat to move, could summon groups of dark rats out of thin air through roars, at least hundreds of them each time!

  Giant rat with summoning ability?

  Jia Lan was shocked. This is a special ability that only devils and demons have. He carefully looked at the giant rat with dirty fur and almost invisible color, and exclaimed: "Dark Mocha Rat Queen!?"

  "What?" A high-level fire magician beside Jia Lan was busy casting magic to help the mercenaries resist the attack of the rats. He didn't hear Jia Lan's words and asked instinctively.

  "Look at its eyes! This is a Dark Mocha rat queen!" Jia Lan pointed at the fat rat queen that was violently colliding in the metal cage. Everyone noticed that this huge rat was a blind rat!

  Of course, the "blind rat" here does not mean that its eyes are blind, but that it does not have eyes at all.

  There are only two deep depressions in the original eye sockets, and it is obvious that the eyes have degenerated.

  Eye degeneration usually occurs in biological groups living deep underground.

  Although this place is also underground, it is quite close to the surface. The eyes of other giant rats and dark demon rats have not degenerated, which means that this is not the native place of this super giant rat queen.

  Coincidentally, Jia Lan is not unfamiliar with this blind rat. Although he has not seen it with his own eyes, he has seen the hand-drawn illustrations of the Dark Mocha Rat in the book "Underworld Biological Atlas".

  The Dark Mocha Rat lives in the deep underground called the "Underworld". In their infancy, they are not much different from ordinary rats except for their huge size.

  However, as they grow, their size will become larger and larger, bone spurs and bone armor will grow on their bodies, and their eyes will gradually degenerate. They can only hunt food by smell and hearing.

  The group morphology of the Dark Mocha Rat is very similar to that of ants and bees. The entire group is the offspring of the Rat Queen, and all of them are male individuals without reproductive ability.

  The rat queen cannot hunt on her own due to her large size and needs to rely on her offspring to collect food for her. Her main task is to eat and reproduce desperately to continuously expand the population.

  It is said that a population of dark mocha rats can reach hundreds of thousands or even millions of individuals, and the only thing that can limit the population is the source of food.

  The more abundant the food, the larger the population. When food is scarce, the rat queen will even feed on her offspring to prolong her life until food is sufficient again.

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  When the Rat Queen is in danger, she will directly call on her direct descendants to come and protect herself, which is the summoning phenomenon seen by Jia Lan and others.

  This Rat Queen imprisoned in the metal cage is not the first generation of the Dark Mocha Rat Queen.

  After all, these closed underground ruins have been unattended for thousands of years. During this long period of time, the Dark Mocha Rat that left the "Underworld" may have mutated.

  Therefore, Jia Lan did not find the group of Rat Kings responsible for protecting the Rat Queen and reproducing offspring, and the group of "Soldier Rat" responsible for protecting the entire tribe around the Rat Queen.

  This reduces the danger of this Dark Mocha Rat to a certain extent.

  In the dark ruins of the Dragon Worship Temple, the first generation of Rat Queen seems to have been carefully imprisoned in the metal cage by the Dragon Worshipers.

  However, when the first generation of Rat Queen died, her successor not only did not escape from the cage but regarded it as a shelter and passed it down from generation to generation.

  Therefore, the newborn rat queens regarded the metal cage that imprisoned them as their nest and throne with peace of mind, enjoying the offerings of their offspring.

  Jia Lan wondered why the dragon worshippers would imprison a mocha rat queen from the dark region here. Was it to conduct some evil magic experiments and needed a large number of experimental subjects?

  This seems to be the most reasonable explanation. After all, the Black Mocha Rat King has an extremely amazing reproductive capacity. It only takes a moment to reproduce a huge population. With a single order from the Rat King, he summoned nearly a thousand Black Mocha rats.

  "Damn it! Are we breaking into a rat nest?" Kenmet shouted.

  The rats rushed over like a tide, and the position they had finally captured was instantly recaptured, and even the retreat was surrounded by dark magic rats.

  The dark mocha rats have been breeding in this relic for countless years, and the underground is almost opened up by them!

  The remains of the Dragon Worship Temple provided a sufficient source of food for the Dark Mocha Rat. The Rat Queen had enough direct descendants to summon, and even planned to fill the Rat Cage Hall with them!

  Everyone was fighting desperately, and the magicians dared not hold back. Once the rats broke through the mercenary defense line, these magicians who were powerless in close combat would only become food for the rats.

  Jia Lan also cooperated with the magicians to release the powerful "chain wind balls" to strangle a large number of Mocha rats who lost their minds because the safety of the Rat Queen was threatened.

  However, the rats seemed endless and continued to pour out from the Rat Queen. Even if everyone had tried their best, the rat corpses were still piled up in the attack range.

  If this goes on, the mercenaries will soon be unable to resist, and the magicians will also run out of magic power. By then, even if Jia Lan's chain wind balls are strong, they will not be able to eliminate all the Mocha rats alone.

  Jia Lan frowned, and he realized that the trouble seemed to be more than just the rats.

  The rats' trampling was rapidly destroying the plants that the wood magicians had grown. These plants were supposed to purify the polluted air and the virus toxins.

  Moreover, the Rat Queen was still spewing out black mist. Although Jia Lan didn't know what the black mist was, it was not a good thing!

  While quickly releasing the windball, Jia Lan said to the magicians around him: "This won't work! Can you attack the Rat Queen?"

  The senior fire magician took a look at the giant metal cage in the center of the hall and shook his head: "The distance is too far!"

  This rectangular rat cage hall is about 250 meters long and 200 meters wide, with hundreds of thick stone pillars supporting the dome.

  The secret door where they were located was in a corner of the hall, more than 100 meters away from the giant metal cage in the center of the hall, and there were five or six layers of cage arrays in between. Even the magic released by the senior magician could not reach such a long distance.

  "In that case..." Jia Lan looked up at the intermediate wind magician above him, who was using the wind flying technique to float in the air and attack the rats.

  Jia Lan took out a bottle of "levitation potion" and drank it. His body lightened slightly and floated up from the ground.

  "Levitation potion" is not a "flying potion". It can only make people float at a vertical height of ten meters above the ground.

  After all, Jia Lan is only a high-level mage apprentice and cannot cast flying spells. His floating action did not surprise the wind magician in the air. He just nodded to him and continued to throw windballs at the rats on the ground.

  "Mage Reka, can you take me to a higher altitude? It would be best if you can take me to the vicinity of the Rat Queen?" Jia Lan pointed to the center of the hall.

  Although he can float, he cannot avoid the attack of the rats at a height of ten meters.

  The Mocha Rat's jumping ability is amazing, especially when the ground is covered with three-meter-high rat cages. With a little leverage, it can pounce from the air.

  Magician Rika looked at Jia Lan in surprise.

  Jia Lan shrugged, unable to explain why he could float but couldn't "fly" to the Rat Queen. He could only summon a huge fireball and threw it at the rats, blowing up a large group of Mocha Rat Queens. He said to Lika with an innocent look, "I said I'm not a wind magician, do you believe me?"

  Magician Rika was stunned for a moment, and then he remembered that this magician Jia Lan seemed to be not limited to the wind system!