Chapter 538 Survival

Rangna, Chuck and others, who have been banned from a series of high-tech, are hiding in a cave at this time, discussing how to complete the trial while warming up.

"Speaking of which, if you just warm up here, won't you suffer from lack of oxygen?" Uzumakihara asked hesitantly.

Jean Na, who has rich experience in wild survival, shook her head: "Don't worry, have you seen the underground river deep in the cave? Normally, caves with running water will not lack oxygen inside."

Uzumaki Hara suddenly realized that he is actually a new generation of ninja universe. If he is an old-fashioned ninja, their experience in wild survival is better than that of Jeanna.

Of course, this also has something to do with the body. The current members of the Human Revolutionary Federation actually don't need oxygen and water.

It's just that in this trial mission, the brain blocked many of their abilities. At this time, Rang Na and the others are in the state of ordinary people, at most they are stronger.

Faced with this deceitful restriction, they can only bite the bullet.

Otherwise, let alone warming up in the cave, even bathing in magma is not entrusted.

Usopp and Chuck collected a large bag of fruits and plant leaves in the surrounding forest and returned to the cave.

Since this planet is imitating the environment of another universe, there is naturally no food they are familiar with to gather. Looking at the fruits and plant leaves in front of them, everyone looked at each other in blank dismay.

Fortunately, Usopp has studied biology and has experience in field collection. The plants he collected were all eaten by those herbivores.

But he didn't let everyone eat right away.

Just because native animals can be eaten doesn't mean they can too.

After Usopp cut a purple fruit similar to a banana with an obsidian stone knife, he squeezed out some juice and dripped it on the elbow socket of his arm.

The others also chose a kind of fruit and leaves, and squeezed out the juice to drip on their arms.

When facing unknown plants in the wild, if you want to determine whether they are suitable for consumption, you must follow a complete testing principle.

Namely: observation, smelling, skin irritation, lip licking, tongue tasting, chewing, swallowing, eating.

Usopp and Chuck had already completed observation and sniffing before.

Skin irritation is going on now, followed by lip licking, tongue tasting, chewing, swallowing, eating.

Among them, skin irritation, lip licking, tongue tasting, and mouth chewing should be separated by at least 10 to 15 minutes.

After swallowing, you need to wait at least 5 hours before entering the eating stage.

If there are adverse reactions such as nausea, retching, dizziness, skin rash, and skin pain in the middle, then the plant can basically be excluded from the diet.

This is a test that must be strictly implemented, otherwise, if you eat it casually, you will most likely receive a boxed meal directly.

Fortunately, there are carbon-based organisms on this planet, otherwise they wouldn't even be able to get food.

In fact, they don't need to worry too much about this aspect. The intelligence brain only wants to test their ability to survive, not to ask them to die.

The trial planets for each team are specially set up according to local conditions and the purpose of the mission.

Just like the team of Jeanna and Usopp, the simulation scene was specially set up to test the members accidentally wandering on a living planet in a different universe.

After more than seven hours of testing, they initially screened seven edible plants.

Including Purple Banana, Snot Fruit, Cucumber Bamboo, Salty Leaf, Chiyan Mountain Grape, Bone Tree Sprout, Lactic Vine.

Starch-rich purple bananas, although very green in taste, can be cooked like beggar chicken and become a staple food after being stuffed.

After not eating for more than seven hours, they made a big pile of purple bananas and cucumbers and started to gobble them up.

Cucumber bamboo is a bit similar to asparagus. When collecting it, just break off the shoots on it. The taste is similar to cucumber, but the sweetness is relatively high. Usopp tested it, and the sweetness is at least around 7.6.

After eating something.

The crowd started meeting again.

"The climate here is a bit subtropical. In the forest at the foot of the mountain, there are about a dozen purple banana trees initially found, and the purple bananas on them weigh about 300 kilograms. This can only meet our needs for a month or two." Wu Thorpe spoke first.

Jeanne added: "Moreover, the fruit of this plant is not resistant to storage and there are seasonal problems. We need to expand our food sources, otherwise we won't be able to last for 10 years."

The boundary chamber, which has not opened its mouth all this time, took out a large leaf, and some white ash powder had accumulated on the emerald green leaf.

"I found this on a rock wall deep in the cave."

Chuck sticks it lightly with his fingers. This is a crystal powder. As a material engineer, he quickly figured out the composition of this thing.

"It's potassium nitrate."

"Yes, it's potassium nitrate. There is a saltpeter vein inside the cave." Jie Shi replied.

Jean Na's eyes flickered slightly: "Potassium nitrate... this thing can give us a little bit of self-defense power."

"Not enough, charcoal is easy, but I don't know if sulfur is nearby." Uzumakihara reminded.

Usopp shook his head: "Don't hope for sulfur. There are red soil hilly forests nearby, and there are no volcanoes. It's better to find sugar plants and directly refine sugar."

For Usopp's proposal, Chuck nodded:

"That's true. White sugar and potassium nitrate are more powerful. The sweet medicine prepared can explode at an initial velocity of 3200 meters per second, which is almost half of that of xanthate."

"I don't know if there are sugar plants nearby, what a trouble!" Usopp scratched his head.

As the captain, Jeanne made a decisive decision.

She asked Usopp and Uzumaki to conduct a rough exploration of plant resources in the nearby forest, and collect some edible plant fruits for storage.

Jie Shi continued to explore the cave while firing some saltpeter.

Rang Na and Chuck are responsible for conducting a mineral resource exploration on several nearby hills to see if they can find some open-pit mine veins that can be used.

That night, they took turns keeping vigil.

The next day, Usopp made two longbows and five carbonized spears, and Jeanna and others also used obsidian to smash three stone axes.

After obtaining the preliminary simple weapons, the group began to act separately.

In the dense virgin forest.

Usopp was behind, waving the sling, smashing small stones into the surrounding jungle.

Uzumaki Harufu was carrying a longbow on his back, and the spear in his hand kept hitting the surrounding grass and vines.

The dangers of the virgin forest are mainly large carnivores and highly poisonous creatures that are hard to guard against.

Suddenly, a large group of sharp thorns shot out from the grass in front left.

With sharp eyes and quick hands, the two hid directly behind the towering tree, and those sharp thorns pierced the surrounding tree trunks and ground.

Usopp observed carefully for a while, only to find that it was a special tree covered with sharp black thorns, which seemed to be stimulated by his throwing stones just now.

He threw another stone.

Sure enough, the blackthorn tree sprayed out a large thorn again.

It wasn't until Usopp molested five times that the blackthorn tree shot out the blackthorn on the trunk.

Uzumaki Hara pulled out a black thorn and found that the hardness of this thing is not inferior to that of carbonized arrowheads, and it can be used as an arrow.

And Usopp looked around, and made new discoveries.

Within a dozen meters around, there are many animal corpses, apparently killed by the blackthorn tree.

Seeing the blackened bones, Usopp reminded: "These black thorns may be poisonous, be careful."