Stamina potions are very versatile, and almost everyone needs them.

Frail wizards rely on it for long hours, and strong warriors rely on it for high-intensity marches. If ordinary people get it, they can use it for farming, blacksmithing, studying, and manual labor at night.

This elixir resembles a stimulant energy bar, which greatly improves the user's ability to cope with harsh environments, and is a good thing like a cure-all. There are a variety of refining materials and different formulas, which also determine different qualities and effects.

Being able to refine physical potions is equivalent to an alchemist's introductory exam, and if you complete it, you will be recognized. If you can get a high-quality product, it is absolutely popular - the medicine has a long effect, there are no sequelae, and the demand for low-priced drugs is in short supply.

Jason, the sharp-hatted wizard, was knowledgeable, and he could see at a glance that the stamina potions produced in Roma's laboratory were of extremely high quality. He had wanted to squeeze more oil and water out of Roma and introduce him to the wizarding group. But when he saw the potion, he immediately changed his mind.

The Fils family is preparing for war, and at this time, an alchemist with great potential is selected to join the wizarding group, and the city lord, including the city lord, will definitely appreciate Jason's loyalty and ability, and others will be grateful to him.

Because in large-scale warfare, universal potions are often more useful than some top-of-the-line magical equipment. There's no doubt that good things that benefit everyone can bring great networking advantages.

Rohm was taken away, and only Zhou Qingfeng was left in the underground laboratory. Several hermits emerged from the dark corners again, awaiting further instructions from him. He was silent for a while, then waved his hand, "Look for it, what's worth noting about this place?" ”

Rohm's financial resources are limited, and it is not very large to build a laboratory, only about 100 square meters. The original laboratory bench was pushed aside, and his bookshelves, medicine cabinets, equipment rooms, and finished product storage rooms were placed in the corners.

The hermits wander around, and the information they get is sifted by Sophia. Soon several copies of the book were revealed. It was the price list of the supply and demand of magical materials on the market in the Banshee Castle, and Röm made a lot of annotations on it.

"Trolling, grimace mushrooms, scorpion spiders...... how can anyone be buying these things? These materials are more out-of-the-box, but they are the main ingredients of the powerful hallucinogenic drug 'shaking powder'. Zhou Qingfeng thought of a certain notorious recipe.

"Interestingly, 'Shakehead Powder' can only be used in an enclosed environment. This is clearly not prepared for war, but rather for some kind of conspiracy. Zhou Qingfeng was surprised, "This Banshee Castle is really a lot of things." ”

In order to join the wizarding group of the Banshee Castle, Rom still put a lot of effort into it. Zhou Qingfeng found the roster of well-known people in the city that he had collected, including the members of the Fils family, the wizarding order, and the list of key personnel of the city lord's guard.

This list came at the right time, so that Zhou Qingfeng was like a treasure, and it was of great help to him to understand the enemy. The list collected by Rohm is also particularly interesting, noting the nicknames and personalities of some well-known figures.

For example, the current city lord Lao Firs, known as the 'Fox of the Northlands', relied on a series of vertical and horizontal alliances to win the opportunity for the family to dominate the Northland.

The current heir to the city lord, Louis. Fils, also called 'Little Fils'. He inherited his father's cold and cunning character, and the Northlanders called him 'the vampire of Banshee Castle'.

The leader of the Banshee Castle Wizard Order, known as the 'strongest wizard in the Northlands'. There are 'three hungry wolves' in the family guard, Quinn, who is the first in martial arts, Arad who is good at leading the team, and Anton, who is cruel and ruthless. The trio is known as rampant in the Northlands.

There are quite a few people with nicknames, and Rohm even records the deeds of these people one by one.

Uncle Zhou was still frowning at first, feeling that he had encountered a bunch of cattle. Until I saw a guy who was the 'No. 1 archery in the Northland', and his deeds were to kill two enemy serf soldiers with an arrow from a distance.

"This ......, why does it feel like 'Tokaido's first bow tori' appeared?" Zhou Qingfeng scratched his head, "Could it be that the war in the Northland is a fight between the village chiefs?" Wait...... the strength of tens of thousands of people can be regarded as the mayor of the town. ”

Flip through it. Waving his hand to let the hidden servant put the various books back in place, Zhou Qingfeng saw that Roma had not come back yet, but he wanted to continue to practice his hands and do something. The 'Gate of True Knowledge' is a virtual world, and it is a flaw that there is no physical object after repeated practice.

"Idle is idle, pass the time." Zhou Qingfeng meditated in front of the experimental table, and the perfect body automatically joined the magic net. His mind was flooded with one powerful artifact after another that had caused an uproar in history.

None of them could be refined by him.

"Hey...... you can't be ambitious. Let's start with the lowest level. Zhou Qingfeng's thinking sank, and he felt that he had to solve some social pain points, "What is the biggest pain point in the North?" There is no sun. ”

Build a lamp?

Zhou Qingfeng looked up at the ceiling of the underground laboratory, a luminous stone projected a cold light without temperature, "It would be nice if we could create a bright heat source." ”

There are many techniques that can produce light in the arcane arts, and the lowest tricks are 'Wizard's Fire', 'Light Magic', 'Light Dance', and the like. But the light produced by these spells has a drawback without exception - there is no temperature.

"It's not easy to have a bright, hot and cheap light source." Zhou Qingfeng thought about it left and right, and even went deep into the 'door of true knowledge' to rummage through information, and the accumulation of history of twenty or thirty thousand years gave a lot of solutions.

But most of the plans are extraordinarily flashy and extraordinarily expensive. Is it cheap......

One of the Dark Elves' proposal is very special. In order to solve the lighting problem in the dark area, a certain 'black skin' got a large piece of lava from the abyss that emitted high temperatures. As a result, the hot, shiny lava stone Queen Rose.

The fate of the black skin was quite miserable, and he was turned into a tortured and undead arachnid spirit soaked in the abyssal lava - Zhou Qingfeng mourned for a second, and then thought of his succubus 'friend'.

"Edith, I remember you saying that the place you live in is called Lavatown." Zhou Qingfeng sent a message to the abyss and asked, "What kind of place is that?" Is there a lot of lava? ”

The succubus replied angrily, "Our place is called Lava Town, and it's actually a huge steel fortress. The entire fort was built on a huge lava lake. This place is hot to death, do you say there is a lot of lava? ”

"Do you have any lava stone that glows and heats continuously?"

"Yes, that's a lot. Don't tell me, you want that. I can send you a lake full of lava rocks, enough to flood the Black Forest where you are staying. As long as you can provide the cost of shipping. ”

"Bring me some, I'd like to see them."

The succubus really threw a few 'lava stones' at Zhou Qingfeng casually. As soon as these stones appeared, they emitted high heat and heat, and they fell on the experimental table, and immediately burned the fine oak planks and emitted white smoke.

Damn, it's like lava!

Zhou Qingfeng had to sweep them to the floor with a strange scream. These stones are also very brittle, and they explode directly after they hit the ground, and a large amount of fiery debris is exploded with a bang. The debris flew everywhere and quickly ignited flammable materials in the lab.

Damn, don't do this!

Why is this thing so dangerous?

Zhou Qingfeng was in a hurry, hurriedly threw an orange crystal into the plane passage, and shouted to Meadis urgently: "Hurry up and give me a 'Ice Technique' scroll, I'm on fire here!" ”

Hahaha...... the succubus laughed and was so happy, "Stupid, who let you play with lava stones?" We hate it here. You deserve it! ”