Unknowingly, Song Jian had already flown to the area of the level forty monsters, and was chased all the way by a large group of level forty mutant rotting birds, and Song Jian finally got rid of it and returned to the manor castle.

"Whew, it's so dangerous, I almost can't come back." Song Jian looked at the group of rotting birds that were slowly disappearing in the distance, and said with palpitations.

This group of mutant rotten birds actually chased Song Jian to the tenth-level monster area before slowly stopping, if it weren't for the flight speed of the steel wings, which was just faster than this group of rotten birds, Song Jian would be really dangerous this time.

This also poured a basin of cold water on Song Jian, who had just increased his strength and was a little overconfident, and made him understand that in this city of doom, there were still many monsters that he could not provoke.

The construction of the manor castle is proceeding in an orderly manner, within the scope of the war alliance, one building after another has risen from the ground, after the previous war alliance war, there are few war alliances around that dare to provoke the "City of Hope".

"Lord Lord, the manor has now developed to the limit, and it is necessary to upgrade the fourth-level manor!" When the housekeeper George saw Song Jian coming back, he hurriedly took a thick account book and reported to Song Jianyu.

"Thank you, George, the manor was able to be built so well, so quickly, all thanks to you!" Song Jian said with a smile: "If you meet the conditions for upgrading to a fourth-level manor, then you will be promoted." ”

In fact, for the development of the entire manor, Song Jian is almost a hands-off shopkeeper, unless some special materials need to be collected by Song Jian, under normal circumstances, everything in the manor is made by George, saying that the manor was developed by George, and Song Jian will definitely not have any objections.

"Lord Lord, if the Manor Castle wants to be promoted to the fourth level, it still needs to build a magic tower, a first-level magic tower, before it can be promoted to the fourth level!" George bowed and said.

"The Magic Tower? Then you're done! Song Jian frowned slightly: "Is there any material missing?" ”

"The other materials are easy to say, we can buy them through the Spark shop in the City of Songs, but to build a magic tower, we need a magic source stone, which is a control material, and under normal circumstances, it is difficult to buy it from the market!" George said, "In addition, the magic tower also needs a mage to be stationed, so it's best for adults to recruit an NPC of the mage class!" ”

"The Mage Class NPC doesn't need to be recruited separately, I already have a Bloodline Wizard Follower who can keep it in the Magic Tower." Song Jian said with a smile: "But if you want to use the magic source stones, I need to ask, how many magic source stones are needed to build a magic tower?" ”

"My lord, you don't need much, you only need a kilogram." Butler George said.

"Okay, I see, let's go down." Song Jian nodded and said.

Magic Source Stone, Song Jian also heard of it for the first time, there are too many strange things in this game, and Song Jian can't understand them all.

"Damn, can't you get a game website, what do you need, just check it on the website, and now you have to ask around for this kind of material!" Song Jian shook his head and scolded in his heart.

Asking about the Demon Source Stone, Song Jian's first thought was Anne's steward of the Silver Moon Business Group, and he was the first to contact her directly, and soon, Anne answered his call request.

"Steward Anne, can I ask you about the Magic Source Stone?" Song Jian asked.

"Magic Source Stone? That's a controlled material, even our Silver Moon Chamber of Commerce is not qualified to sell it, once caught selling more than ten grams of magic source stones, you will be directly sentenced to death! Anne was surprised.

"I just wanted to ask, where is the origin of this magic source stone?" Song Jian originally wanted to buy it directly from Anne's steward, but when he heard Anne say this, he directly dispelled this idea.

"Of course, there is no problem with this, the magic source stone is not an ore, but a bezoar of a creature, and only by hunting this creature can it be possible to obtain the magic source stone...... Anne smiled.

"I guess this creature must not be so easy to hunt!" Song Jian said angrily.

"Giggles, of course, this creature is called a demonized bat, and the adult demonized bat has the strength of a level 30 elite boss, and most importantly, they are all social creatures, and when they appear, there are hundreds or thousands, such a terrifying existence is not something that ordinary people can bear."

"Hiss~, thousands of level 30 elite bosses......" Song Jian couldn't help but gasp: "It's really unbelievable, I even doubt now how the first magic source stone was obtained." ”

"Hehe, of course I wouldn't fight such a terrifying group of creatures." Anne laughed, "After staying in one place for a long time, the demonized bats will abandon their nests and move to another place. In their abandoned nests, they can often collect some magic source stones, you know, the use of magic source stones, not only to build magic towers, it can not only improve people's physical fitness, prolong people's lifespan, but also strengthen the power of skills, in the eyes of some people, magic source stones are stronger than doom coins hard currency! ”

"Oh, is it really that amazing?" Song Jian was stunned for a moment, and suddenly asked in a low voice, "Could it be that no one really dares to risk smuggling such a thing?" I believe that as long as it is an item, there is always a price, can you tell me, on the black market, what is the price of the magic source stone? ”

Anne was silent for a long time before she spoke: "If I have a magic source stone, I will never sell it with doomsday coins, it is generally bartered, and if you really want to give the magic source stone a price, I believe that one gram of one gram of doomsday coins is a more suitable price!" ”

After Anne finished speaking, she hung up the communication directly.

Song Jian had a shocked expression on his face, one gram of Demon Source Stone could be sold for 100,000 Doomsday Coins!

Just now I heard George say that it would take a kilogram of magic source stones to build a magic tower, and Song Jian didn't care, but now it seems that even if he sells his entire territory, he may not be able to get together a kilogram of magic source stones.

"This is equivalent to 100 million doomsday coins, my God, can anyone really upgrade their safe house to a fourth-level manor?" Song Jian couldn't help but complain.

Dididi~

At this moment, the communicator suddenly rang, and Song Jian saw that it was Anne in charge, so he quickly picked it up.

"That's right, Song Jian, I forgot to tell you just now, the place where the demonized bats are infested, will infect the surrounding monsters, and produce some close relatives similar to them, I remember, you used to sell some materials 'bat wings' I guess that this should be an item that will be dropped by the close relatives of the infected demonized bats, if you go to explore around the monster that found the 'bat wings' at the beginning, I believe there will be a harvest." After Anne finished speaking, without waiting for Song Jian to reply, she hung up the communication directly again.

Song Jian looked at the hung up communication with a thoughtful look: "What does Annie mean is that the original bat-wing zombies were infected by demonized bats, as long as the bat-winged zombies appear, they will definitely be able to find demonized bats?" ”

……