Chapter 653 Two Portable Killers, Arrange Them Together!

Let's put aside the dose and talk about toxicity... No, let's put aside the issue of dose control, just talk about the issue of remotely injecting medicine into the opponent's blood vessel.

After repeated experiments and summarization, Grete and Lynn discovered two rules:

First of all, the stronger the subject's physique, the greater the spell resistance.

"The resistance of a cow is greater than that of a rabbit; the resistance of low-level monsters is greater than that of ordinary animals."

Gretel jotted down a few strokes. He raised his head and looked at Linn with concern:

"So, if your enemy is a high-level powerhouse..."

"So we have to find ways to reduce resistance as much as possible." Lin En smiled nonchalantly. Facing the powerful enemies we may face in the future, there is no trace of worry on his face:

"Second, the farther the distance between the input medicine and the human body, the greater the spell resistance."

"Have you tried it before?"

"Previous people have tried it. For example, the resistance of saltpeter is greater than that of nitroglycerin, while the resistance of mercury and arsenic is already so great that the failure rate is 90% when the same level is cast against the same level and skilled."

Otherwise, why choose saltpeter? It's a balance between success rate and lethality.

It’s not that the senior mages have never tried other casting materials, but they are either too laborious or the effect is too poor...

For example, inject a drop of water into the other person's veins? My resistance is small, but it’s useless!

emmmmm……

"So Brother Linn, the material of this spell is changed to the components in the body of the recipient, so it has the least resistance, right?"

"Yes, but -"

Lin En suddenly stopped speaking. I saw Gretel jingling, jingling, jingling, digging around in the space bag for a while, and took out a small medicine bottle.

"Brother Linn, will you try this?"

Lin En took it dubiously. If you look closely, you will see that the fine white powder looks similar to table salt;

Pour out a small amount and rub it with your fingertips, the texture will be similar;

Looking at Grete inquiringly, Grete nodded and smiled with encouragement:

"It's fine if you lick it and taste it. Don't worry, it's not poisonous."

Linn took a lick without hesitation. Then, his face couldn't help but twist:

“So salty!”

So salty and bitter!

If this thing is table salt, it will make you cry to death!

"Potassium chloride?"

Grete shrugged beside him.

"Impure salt also contains this, and blood also contains this. Brother Linn, come on, try it?"

Linn took a deep breath, drank a bottle of mental potion, and cast the spell again. This time, the magic power ran smoothly and smoothly without any resistance.

Sure enough, what is already in the body has the least resistance?

The magical power wrapped around the blood and the potassium chloride dissolved in the blood, and rushed into the rabbit's body. In an instant, the rabbit let out a scream of pain and fell to the ground.

Grete, with his sharp eyesight and quick hands, took out the stethoscope and handed it to the side. Linn quickly put on the stethoscope, pressed it on the rabbit's chest and listened——

there is none left.

There was no heartbeat at all.

He glanced at Gretel in shock. Grete tilted her head towards him and spread her hands:

"That's right, this thing is really not poisonous. Just a small amount, if you drink 10 times the amount, nothing will happen."

However, high concentrations of potassium chloride, injected intravenously, can cause cardiac arrest. In Gretel's previous life, this was the method used to carry out executions.

Of course, intravenously injecting high concentrations of potassium chloride can cause severe pain. For humanitarian reasons, death row prisoners will be injected with anesthetics before injection...

But there is no need to say this. Anyway, whoever Brother Lin En unleashes this spell on, it will definitely be a fight to the death:

"Brother Linn, you just need to remember that when this thing is injected into the human body, it will cause severe pain - I am not sure whether this pain can interrupt the spell casting - but once it enters the heart, cardiac arrest will occur instantly -"

"Then...is there any way to save it? For example, using magic like detoxification to drain the potassium chloride from the human body?"

Gretel sighed deeply.

"If you drain it, you will definitely die. You don't even have to drain it. If your blood potassium is as low as one point or so, your muscles will be weak, your heart muscle and respiratory muscles will be unable to beat, you will still die quickly."

Yes, potassium ions are such a magical thing. It's not good if it's too high, it's not good if it's too low. If you exceed the upper limit, you will die. If you fall below the lower limit, you will die as well.

Linn put the bottle away with a solemn expression. With this trump card, if you move quickly, are injured, the opponent is of a higher level, or the success rate of spell casting drops significantly, it is equivalent to gaining an extra life!

"you……"

"Brother Linn, I have another idea, it might be worth trying." Before he could say thank you or something similar, an idea flashed in Grete's mind and he interrupted hastily:

"Try the air! If you don't have anything with you, injecting air and blood into the enemy's body might work!"

When people take risks outside, there will always be times when they become homeless and lose everything. But if his calculation is correct, then if you wipe a drop of blood from your body and hold a handful of air, you can use this spell to counterattack!

Linn was confused for a moment, but after seeing Grete urging him again and again, he still did as he said. Gretel kept coming up with ideas:

"Heart! Aim for the heart! Pour air into the heart! This is the fastest!"

While commanding, he had already thrown out a blood oxygen saturation magic and an electrocardiogram magic, which landed on the rabbit. On the light screen, it was full and bright, with 100% saturation, and the ECG lines were regular. Everything on the rabbit looked normal.

The spell is thrown out silently. There was no fire, no acid, nothing tangible that one would immediately notice. In other words, if you use this spell to assassinate someone from a distance, the probability of being noticed will be greatly reduced.

However, not long after the spell was thrown, the blood oxygen saturation plummeted, and the rabbit breathed rapidly and became restless. The electrocardiogram was running up and down like crazy, and not long after, a straight line was drawn out——

"Heartbeat stopped?!"

Linn said in shock. Gretel sighed softly:

"Yes, air embolism caused cardiac arrest. Brother Linn, you must be careful with this magic. If you throw it at the wrong person, I'm not sure I can save it!"

"Don't worry!" Linn agreed. He looked at Grete and hesitated to speak. Before he could speak, Grete had already answered:

"Want to report to Black Crow Swamp? Want to write a thesis? It's all fine! - But brother Linn, you have to help me disassemble this spell. I want to study how it controls the dosage!"

"No problem!" Lin En slapped her thin chest loudly:

"Don't worry, I will never leave Nevis until I teach you!"

...Do you want to go out on adventure again? !

Although he was worried, Grete also knew that everyone had their own path to advancement. Just like Grete himself, if he didn't work hard to practice medicine, he might be stuck as a priest apprentice. As for Lin En, if he doesn't go out to explore, it will probably be detrimental to his development...

Therefore, Grete had no choice but to work hard to delay the learning progress and let Lin get more familiar with this magic. Of course, he had his own troubles:

"So how exactly do you determine blood potassium levels?"

Beside Lin, there was a plate of potassium chloride, a pair of tweezers, and a row of rabbit cages in front of Linn. It has progressed to the point of pinching one pill, casting the spell once, pinching another pill, casting the spell again...

****

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Hyperkalemia and hypokalemia are both really dangerous, really.

Be sure not to take it lightly.

And let me sigh, Gretel is really good-tempered and unwilling to kill people, otherwise even a high-level mage would not be able to guard against him.