When you go deep into the cave, a faint smell of sulfur will quietly invade your breath, and coupled with the suffocating heat, people can't help but wonder if there is a hot lava lake hidden nearby.

  However, their arrival alarmed the overlord of the cave - the giant rat group.

  As pairs of green eyes flashing in the fungus gradually appeared, Captain Kenmet waved his hand without hesitation: "Retreat!"

  After they quickly retreated to the crack of the secret door in the west, the five silver mercenaries quickly formed a defense line, using the narrow terrain to hold the crack and block the rat group that was pouring in like a tide.

  This "rat nest" is huge in scale, and the number of giant rats and dark magic rats in it is countless. Obviously, it is not something that their ten-man expedition team can easily deal with.

  After a brief discussion, Jia Lan took out the "Communication Mirror" and contacted Casey and Dave on the ground, asking them to gather manpower and tools, enter the dungeon, and renovate the long-abandoned ruins as their base camp and transit station for ruins exploration.

  At the same time, Captain Kenmet also contacted his two deputy captains through the "Communication Mirror" and summoned the remaining mercenaries to come to support.

  Both parties also issued martial law and gag orders, and any news about the ruins was strictly prohibited from leaking out before the underground ruins were cleared.

  While waiting for support, Jia Lan took out the mysterious gem.

  In the surprised eyes of Kenmet and others, the gem projected a three-dimensional phantom in the air.

  Careful identification can reveal that this is the miniature map of the route they took after entering the dungeon.

  Seeing the surprised looks of the mercenaries, Jia Lan simply explained: "This is a 'positioning gem' that can record the route we have taken. Like the 'communication mirror', it is a powerful assistant for exploration."

  As he spoke, Jia Lan gently stroked the positioning gem, enlarged the area of ??the rat's nest that he had just entered, and turned it into a flat map to show everyone.

  This "phantom map" floating in front of everyone clearly showed the terrain of the rat's nest, which was a large underground cavity.

  Due to the humid environment caused by the underground river, a large number of fungi and mosses have bred here, forming a unique ecological microenvironment.

  The fissure channel they just entered is just a branch of this underground cavity.

  "Look here! We are here..."

  Jia Lan enlarged the phantom map to the extreme and pointed to a corner of the map that was about the size of a round table. Everyone focused their attention on it.

  Jia Lan waved his finger and marked a door symbol in a corner of the map with a secret mark.

  "This is an underground fissure and underground river. Look further ahead. Did you notice here? There are many broken rocks and stones of regular shapes..."

  Jia Lan's finger moved on the map, pointing to a corner not far from where they were discovered by the giant rats: "Those stones clearly have traces of artificial carving. I suspect that there is a way to other areas of this ruins."

  Everyone gathered around the phantom map and looked at it curiously.

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  The map projected by the positioning gem was translucent, showing the underground cavity of the rat's nest in front of everyone in the form of a cross-section.

  Where they were standing at the moment, Jia Lan used the mysterious mark as ink to outline a bright spot in the void. With this as the center, the surrounding scenery spread out like a scroll, with virtual and real interweaving, and everything in sight.

  And those areas that have not been seen with their own eyes but have been set foot on are gently covered by a layer of mist and veil, and as for those unknown secrets, they are silent in the boundless depths.

  What is particularly eye-catching is that next to the white light dot representing the positioning gem, there are a few fresh green spots, like loyal guards.

  In the dark space on the other side of the rift, there are occasionally a few scarlet flashes, and then they disappear in a flash, like ghosts in the dark night.

  Without Jia Lan's words, the mercenaries have understood: the green dots are partners fighting side by side, and the red dots are the cunning giant rats.

  Captain Kenmet looked at the communication mirror and positioning gem in Jia Lan's hand, with a gleam of desire in his eyes.

  These two magic treasures are undoubtedly powerful assistants during the adventure, but he knows that it is difficult for non-magicians to control them.

  Although there are many resident mages under his command, how can this young mage easily give up such rare things?

  Therefore, despite his covetous heart, Captain Kenmet still restrained the thought of asking, and only commanded them to launch a counterattack against the Rat's Nest immediately after his mercenaries gathered.

  The reason why the Golden Two-Headed Dragon Mercenary Group can stand firm in Kelan County is not only because of the protection of President Clark, but also because of its own superior strength.

  More than a thousand Black Iron-level mercenaries, five hundred bronze warriors, sixty or seventy silver elites, and even five "golden mercenaries", such a lineup is enough to scare any opponent.

  Even if it does not have an advantage in numbers, the Golden Two-Headed Dragon Mercenary Group is undoubtedly the best in terms of combat power.

  Due to the cooperation between President Clark and Jia Lan, the Golden Two-Headed Dragon Mercenary Group suspended other tasks and all members gathered in the Doom Castle.

  Through the communication mirror, the elite members responded quickly, and the five golden warriors, all the silver warriors, and even the magician team came out in full force, and the scene was spectacular.

  One high-level fire magician, five intermediate magicians, and more than ten junior magicians, such a large lineup of magicians shows that the Golden Two-Headed Dragon Mercenary Group has a deep foundation.

  Kenmet admitted that even when carrying out large-scale missions, they had never fought so hard.

  More than 20 magicians, five gold warriors, and dozens of silver warriors, this force is enough to set off a small-scale city-state war.

  Obviously, the battle with the four golden skeletons and the strange teleportation of the Nine Lights Hall left Captain Kenmet with lingering fears.

  There is strength in numbers. The mercenaries quickly cleaned up the giant rat corpses in the rock cracks and transported them outside the dungeon for disposal.

  After all, although the giant rat is only a black iron-level monster, its magic crystals, fur, bones, and claws are all precious materials. A little bit adds up to a lot, which is also a considerable income.

  Hunting monsters and collecting materials are the daily routine of the mercenary group. Therefore, the mercenaries had a clear division of labor, tacit cooperation, and the scene was in order.

  Some mercenaries dug soil from the secret door, mixed it with gravel, filled the cave and gravel pit, and built stairs with local materials.

  Then, an intermediate earth magician waved his staff and cast "rock shaping" and "soil reinforcement" to make the soil stairs and the ground as solid as a rock, and at the same time widened and repaired the rock cracks.

  Seeing this intermediate magician who was only equivalent to a "second-level magician" easily change the shape of the rock, Jia Lan was secretly amazed.

  There are similar spells in the arcane magic he knows, but they are definitely not something that a "second-level magician" can cast.

  Of course, those high-level spells jokingly called "city building" and "city breaking" are far more powerful than the earth magic of this era.

  Although there are many giant rats, they quickly retreated and fled under the fierce attack of the mercenaries.

  Under the leadership of the bronze-level team leader, the Iron-level mercenaries rushed into the rat nest and launched a large-scale cleanup.

  The Silver-level mercenaries and junior magicians stayed in the rear, and once the dark magic rats appeared, they would be hard to escape the encirclement.

  The corpses of these silver-level monsters are more valuable. Their fur and claws can be used to make armor and weapons, and their blood and internal organs are rare magic materials.

  It is undoubtedly a pleasant surprise for the Golden Two-Headed Dragon Mercenary Group to find such a large group of giant rats and dark magic rats in the suburbs of this city.