"Training a hound that can smell the traces of a bleed race requires more than fifteen years of training, and a living bleed race is required as the training target." George continued.

"This is not the most troublesome. After smelling the unique scent of the blood clan, most hunting dogs will hide as far as possible due to the biological pursuit of profit and avoiding harm. At least a few hunting dogs will track this smell. The genes of this hunting dog generally have certain defects. It is this "defect" that causes them to no longer be afraid of the blood clan."

"My father used to have such a hound, but when I was five years old, this old hound that could not be older was already dead... But fortunately, I invented the 'development fluid', which was an extremely important invention even in the thousands of years of family history of the Helsing family."

"Is the developer? Is it the kind of thing used in old-fashioned film photos? Isn't that something that has been in the last century? Are you embarrassed to say that you invented it?" Qi Lin said.

"I just borrowed this name. In addition to the silver halide in the ingredients list, my 'developer' and the developer used to wash photos are completely different. The 'shadow' it can reveal is the trace of the blood clan." George said confidently.

"Okay, I just believe you for a while. I hope your 'developer' can come in handy..." Qi Lin glanced at George's list again and said.

Fortunately, Sanctuary No. 209 is at least a medium-sized shelter, and its location in the underground shelter network is pretty good. It is located on the branch line of a major transportation road. Although these chemical reagents are difficult to obtain, there is no way out.

If this is placed in some remote and remote places, I am afraid that half of the things on the list will not be able to get together.

...

...

The torture room borrowed by Qi Lin has suddenly become a chemical laboratory. The interrogation table was dragged to the center of the room, filled with glassware containing various chemical reagents. Next to the table is a large ceramic crucible, which is filled with all kinds of black and unknown reactants.

At this moment, George was lying on the ground, wearing an asbestos glove in his left hand, holding a long-necked flask in his left hand, and holding a flame spray gun in his right hand, carefully heating the mixture in the flask.

“Bao!!”

The long-necked flask suddenly exploded, and George had already pulled over a metal plate beside him and quickly protected his body behind the metal plate.

The glass fragments hit the metal plate, making a crisp collision sound.

"Are you okay?... This is the sixth long-necked flask you have been bombing..." Qi Lin and 0592 looked from a distance from another corner of the room - at first they wanted to observe it up close, but when the second explosion occurred, the two of them had already given up this idea.

George himself was controlling the experiment process. He could predict in advance when it would explode, but Qi Lin and 0592 could not. When the first explosion occurred, the sharp glass slag even pierced directly into 0592's eyes.

Fortunately, it was a pair of mechanical eyes. The cornea was polished with high-hardness quartz and covered with a transparent metal coating. If it were replaced with a pair of naked eyes, it would be blind.

"No big problem..." George waved his hand and took out a long-neck flask wrapped tightly in cardboard from his travel bag.

"Isn't this a big problem for you? Is it a big problem only if you are bombed to death?"

"Uh... the spirit of science is to avoid failure, right... To be honest, this 'development solution' was actually invented by me by accident. As for the production process, it is still in the process of improvement... First of all, the temperature of the flame is very important, and the temperature of the spray gun is difficult to stabilize and cannot meet my requirements..."

"The temperature is stable? This is easy to deal with. How high do you need?" Qi Lin asked.

"This step requires melting the silver, at least 960 degrees Celsius."

"Ok, Cortana, I'll leave it to you." Qi Lin snapped his fingers, and the Thor's Hammer immediately walked up, pulled out a thermal axe, and placed the axe face in front of George. Immediately afterwards, the color of the axe face began to turn redder, and the temperature around him slowly increased.

In addition to being used as a weapon to break armor, the task of electric baking pans is also easy to handle. On the front line, Qi Lin had seen armored soldiers using thermal axes to heat food.

"Kotana, what's the surface temperature of the thermal axe now?"

“962 degrees Celsius.”

"Is that okay?" George was stunned, but he soon entered the state and poured the new reagent on the surface of the thermal axe. On the surface of the thermal axe, there were several oval grooves. The function of these grooves was similar to the blood groove on the dagger, so that the thermal axe would lead the dissolved metal liquid along the grooves when it chopped the metal armor.

The fine pieces of silver quickly began to dissolve after falling into the groove. Then, George poured over several other solutions that had been configured long ago and gently stirred them with a quartz rod.

"Okay OK, cool down! Cool down!"

“How much has it dropped?”

"First drop to 350 degrees Celsius, slowly and quickly."

George stared at the mixture in the groove of the axe face. After the mixture gradually stabilized, he spoke again: "Start now, it will take thirty seconds to lower the temperature to room temperature, and it will still be necessary to drop quickly."

The surface of the thermal axe gradually returned to its original metallic color, and the mixture in the groove also condensed into a gray solid substance.

"Is this your 'developer'? Is this a success?"

"Successful" George said happily, prying the solidified reactant out of the groove with a dagger and throwing it into a large beaker filled with purple liquid on the table.

The reactant just came into contact with the purple liquid in the beaker and began to dissolve instantly, and a large amount of gas emerged from the liquid.

George hurriedly grabbed the sealing cover and covered it with the beaker, then pointed at Qi Lin and 0592 and said, "Hurry, we have to go to the carriage where the incident happened. The shelf life of this thing is not long!"

...

...

The three of them and Thor's Hammer soon arrived at the carriage where the attacker was found. George poked a hole in the sealing cover of the beaker with an awl, and the gas inside quickly gushed out of the small hole.

After this gas dissipated into the air, it gradually revealed a purple-red mark, which extended from the bathroom to the outside of the carriage.
Chapter completed!