Plan

The leader followed the enemy but all other members were not in the condition to fight.

It seems Genma was able to follow the leader but still is a little groggy.

Although poisons can be lethal, the gaseous ones are diluted in air and thus it is not too dangerous for them.

Other members also came out after Genma as they were also only with little combat power left after poisoning.

Seeing that everyone has little combat power left. The injured Riko suddenly moved to surprise all the members who reached the place.

<NAA: Accelerated speed burst>

Kunai in both hands of Riko danced and left beautiful afterimages while beautifully painting the group red.

The members don't have enough power to fight back after poisoning. Furthermore, both kunai were coated in blood and chakra.

*Puchi**Puchi*...

It was clean death.

Killing them Riko suddenly moved toward the direction leader moved.

He stopped when he reached the corpse of the leader.

"Are you alright boss?" Riko said full of worry.

Seeing the boss did not move Riko's body was still tensed and wary. Riko's cut the head of the leader and

*Poof*

Suddenly what emerged from smoke was not

Riku but Orochimaru.

He stored the head in a storage scroll while burning the body of the leader.

"Plan successful"

Orochimaru's plan was simple. Firstly he transformed into Kiro who was the stalker he killed.

His transformation is more advanced. As he has true sight he can transform more thoroughly based even copying essence let alone chakra.

He would not have risked his life if he did not believe in his transformation capabilities.

After confirming the strength of the group he deployed his plan.

Most of the poisons Orochimaru studied would not affect the chunnins. After all, he was still a genin and he will not be able to study advanced books.

But he can still use blood as the poison.

Furthermore only he can use the poison, as he came to know that his blood will have poison characteristics when his chakra is concentrated on it.

So, firstly Orochimaru released poison in the night when they are the least alert.

The released poison was made by collecting fumes from his blood.

Second, he made a clone and made the area have signs of fighting while injuring himself a little.

After all, he knew that gaseous poison is less lethal than when directly introduced through the blood.

And everyone will become alert after inhaling little poisonous gas.

And as he thought, the boss was alert and followed his clone. But he has chosen a narrow route perfectly that he should be near him.

So, the boss smelled his blood. Although his blood was poisonous the condition for it to activate it with chakra.

So, he just let the smell get into his system but he did not apply chakra.

After the boss passed through the clone his chakra covered him and activated the poison making him vulnerable for some time.

It was expectedly well-timed as the poison took effect at the time when his guard was down the most.

Then, his clone pierced his heart.

How can a clone attack?

It was because he has made a new jutsu using clone and star chakra.

Clone is tangible and unable to attack. But as they are made of chakra he can use them from making star chakra and attack using star chakra construct.

Although it needs high chakra control to make a clone like that and the clone can only attack once even with his chakra control.

Orochimaru checked the corpses and burned them. He can't take the risk if they have a jutsu to fake death.

Certainly, he surprised the leader and members by using unexpected things like blood poison and star chakra clone. Otherwise, the fight would not be so simple.

But who said he will fight head-on like a knucklehead. He likes a clever approach if necessary.

He is a fighting maniac but he would rather do not take risks if he can win easily. Emotions do not hinder his judgment.

Orochimaru found the storage scrolls containing the body of a danger beast on the leader's body.

He knew that he can easily pass the exam with this number of beasts.

But Orochimaru wanted to go on a treasure hunt. If there is a high-level danger beast instead he will kill it.

If he cannot kill it, he still has anbu reinforcement. Wasn't he was here to protect him, Orochimaru can't let anbu san get bored right.

And if even anbu attacked him he still has trump cards to at least save himself if not kill him.

As for why anbu will attack him without any reason.

Orochimaru has recited it thousands of times in his mind to be cautious of even rocks let alone an anbu.

He even checks himself ten times to trust himself let alone others.