One day later, the express delivery that Xia Yuan said was sent.

It's a cardboard box.

Before the box was opened, Ying Sitong heard the movement inside.

The blood clan's senses are better than normal people, including hearing.

Ying Sitong raised her eyebrows and quickly took two steps back, looking at Xia Yuan with disgust.

"Aren't you? You're going to do something like this when you kill a mosquito?"

"What does this mean?" Xia Yuan said angrily, "This is called the law of nature. Even humans have to give priority to natural law when legislating. Doesn't this just show its greatness?"

Xia Yuan said as he opened the paper box and then used scissors to cut the packaging bag inside.

Under layers of packaging, the true face of the express box was untied-

In a transparent plastic box, there are 12 little frogs.

Each frog is probably slightly larger than a dollar silver coin.

Ying Sitong felt her scalp numb and rubbed her back and forth with her hands in her arms.

"I hate green and meaty things."

"I didn't want you to like it."

Xia Yuan shook the box for a while, and the three frogs inside jumped slightly.

In addition to the plastic box where frogs are placed, there are also bags of mud, sand, and plant seeds and instructions prepared by the seller.

The seller obviously sells these frogs as pets, and Xia Yuan’s purchase to remove mosquitoes is probably not in his intention.

【Frog breeding method:

1. Prepare a ventilated water box and divide it into land and water, which means half is mud and sand, and half is water, otherwise the frog's skin will become very dry and may even die. It is recommended to place plants such as water plants next to it, which is beneficial to the frog's habitat.

2. When raising frogs, you should choose a place with "good ventilation and good lighting". This is because frogs are very afraid of heat. If it is too stuffy, it will easily get sick or die, and it is also better for the owner. If it is really unavoidable, remember to install a fan. Frogs still need to look at the sun and will not get sick. Do not be directly exposed to the sun. It is best to add a layer of mesh to the container for raising frogs to prevent the frog from jumping out.

3. The food of frogs is mainly based on living insects.

Because frogs only have perceptions of moving objects, dead insects must use a line to shake in front of the frog when feeding them so that they can eat.

...】

The seller lists it very carefully, for fear that you will die suddenly if you fail to take good care of the frogs.

In addition to the key points of breeding, the key points of frog breeding are also listed.

Xia Yuan hurriedly looked at it, poured out the frog first, and put it on the ground.

Then he stood up and walked to Ying Sitong to spread his hands.

"What?"

"Syringe."

"What the hell?"

"Aren't you a nurse before? I remember the toolbox you brought with you had a syringe in it."

Ying Sitong nodded and went to his room.

After a while, she handed Xia Yuan a disposable syringe.

"I don't know how to use this," Xia Yuan said, gently holding Ying Sitong's wrist with his right hand.

The beautiful young woman in the blood race suddenly jumped.

"What are you doing?" Ying Sitong's cheeks fluttered.

"I need you...ahem."

Perhaps some dust flew into the respiratory tract, Xia Yuan suddenly started coughing.

No?

Because of Xia Yuan's words, Ying Sitong suffered a critical blow and was completely stunned.

Is it so straightforward?

Why at this time?

Ying Sitong put his other hand beside his mouth, and his eyes were filled with an unconcealed sense of shock.

"I, I, isn't it a little too fast? Isn't it good to start by saying that I like you?"

"Ahem..."

Xia Yuan finally stopped coughing, turned around, and said to Ying Sitong, "Blood."

"ha?"

"I need your blood."

"hehe."

Ying Sitong took two breaths of air conditioning and tried hard to suppress the urge to slap him twice.

...

From the perspective of natural laws, it is true that frogs are the natural enemy of mosquitoes, but ordinary frogs are definitely not the opponent of the blood clan mosquitoes.

Therefore, Xia Yuan needs to cultivate [Blood Frog]

Only capital can fight capital.

Only magic can overcome magic.

Only the blood clan frog can fight the blood clan mosquito.

Ying Sitong took out 10 ml of blood and felt so distressed.

But in exchange, Xia Yuan agreed to let her enjoy it once tonight, and Ying Sitong reluctantly agreed.

...

Xia Yuan knew that Ying Sitong's blood medicine was very effective and did not dare to over-inject it at will, so each frog was fed less than half a milliliter.

While feeding the medicine, he remembered a math problem:

The king had 1,000 bottles of wine, but two of them were poisoned, and the toxicity would not occur after 10 days.

But 10 days later, the king will use these wines to hold a banquet.

So he needed to find some death row prisoners to test which two bottles of wine were poisonous.

Question: At least how many death row prisoners are needed. (The answer is 19.)

After feeding the Vampire Holy Medicine, two of the 12 little frogs died suddenly in less than two minutes.

Xia Yuan recorded the whole process with his mobile phone and prepared to record it in his "Diary of Observation of Biology Related to Vampire".

Half an hour passed, only two survived.

Because of drinking Ying Sitong's true blood, the two surviving frogs undergo a wonderful change—

The two frogs were obviously bigger, and they shed a layer of green skin. The limbs became thicker and their tongues were longer. Many strips of protrusions were produced on the surface of their skin. At first glance, they were fighting frogs among the frogs.

One of them had long black patterns on its body, which looked a bit domineering. Xia Yuan named it [Zhenshanhu]

The other one had black spots on his body, and Xia Yuan called it [Black Spot Leopard]

The abilities of the two little frogs were greatly improved, and they immediately started to catch insects:

The rushing power of Zhenshanhu was extremely amazing. It jumped up from the ground, bounced at least two meters high, and then spit out its long tongue in the air.

The white light hits it like a hero shining on the spotlight.

The wind swept through the clouds, and it had eaten a flying blood mosquito from the sky.

It was not until it fell to the ground that Xia Yuan realized.

“The experiment was successful.”

Xia Yuan announced.

Now my mother no longer has to worry about me being bitten by mosquitoes.

The only disadvantage is to endure these two newborn [Blood Frogs] jumping up and down.

Ying Sitong frowned, and couldn't tell whether this feeling was good or bad.

Ten minutes later.

Zhenshanhu accidentally jumped out of the window due to excessive excitement.

Xia Yuan’s home is on the 19th floor.

After going downstairs to take a look, Xia Yuan felt heartbroken.

There is one more item in "Diary of Observation of Biology Related to Vampire" -

Due to force majeure, the blood clan frog soldier.
To be continued...