Orochimaru decided to test Sasuke's strength, he used shuriken shadow clone jutsu and hundreds of shuriken flew towards Sasuke. Sasuke dodged most of shuriken and block rest of them with his sword. He then used his own shuriken jutsu at Orochimaru, many shuriken flew towards Orochimaru which he dodged but to his surprise shuriken collided in mid air and change directions. Orochimaru did not expect this level of shuriken jutsu from Sasuke, he was still underestimating Sasuke. He dodged all the shuriken but one was able to scratch his cheek.
OROCHIMARU: "Your shuriken jutsu lived upto Uchiha clan's name. From what I heard, you are known for your high class taijutsu. Even jonins find it hard to compete with you in taijutsu."
SASUKE: "Should I be flattered that a legendary Sanin is keeping an eye on me?"
OROCHIMARU: "Ku ku ku….you know me!"
SASUKE: "Of course I know you, I don't understand why the three of you have so much reputation in ninja world, they call you legendary Sanin. From what I know one is super pervert who spends most of his time peeking in women's bathroom and writing perverted novel, second is a drunkard and gambler and third is a pedophile who kidnaps children from different villages. I heard your favorite kind are the kids with kekkei genkai."
Orochimaru's eye twitched when Sasuke called him a pedophile. He understood that Sasuke is trying to rile him up and buy enough time for anbu reinforcement to arrive. But he still got little angry at Sasuke for insulting the Sanins. They got their reputation by fighting in two great ninja wars.
OROCHIMARU: "You are trying to buy time, are you sure that reinforcement is coming?'
SASUKE: "You are here means that the team suppose to be here is dead. I am sure their bodies would have been discovered by now so they must know some enemy infiltrated chunin exam. So they must be on their way. Besides I don't need them to come and rescue me, even if I can't kill a cockroach like you, I can still leave if I want to."
OROCHIMARU: "You are very intelligent for your age, your talent surpasses your brother Itachi. But you are wrong about one thing, I am not a cockroach, I am a snake."
Orochimaru summoned a giant snake to fight Sasuke, he knew that anbu team would on their way so he cannot spend a lot of time fighting Sasuke, he needed to quickly put the curse mark on Sasuke.
SASUKE: "Itachi….it has been a long time since I heard his name from someone else. He won't live long and since you try to mess with me, I will kill you after I kill Itachi."
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While Sasuke was fighting Orochimaru, Naruto and Sakura move in direction of tower. On their way they met Sasuke's clone and Karin. Naruto and Sakura were surprised while Sasuke's clone understood that original Sasuke must be facing Orochimaru.
SAKURA: "Sasuke you are here, you already defeated that guy? How can you be here so fast?
NARUTO: "Yeah, you said that guy was stronger than Kakashi sensei, how can you defeat him so fast? Who is this girl behind you?"
SASUKE: "I will explain things when we reach the tower, I already found a earth scroll, you guys have heaven scroll right?"
NARUTO: "Yes."
SASUKE: "Then lets go."
Team-7 and Karin proceeded in the direction of tower. Sakura was curious about the new girl, she did not like the way Karin was looking at Sasuke but she decided to wait until they reach tower to ask about her.
Meanwhile
The giant snake attacked Sasuke, Sasuke used substitution jutsu to avoid its attack. He then threw a kunai with exploding tag towards the snake. Explosion could have killed a ninja but there were only few scratches on snake body. Snake attacked Sasuke again and this time Sasuke dodged the attack while throwing great fireball jutsu at the snake. When the fire cleared, Sasuke saw Orochimaru's head coming in his direction at very fast speed. Orochimaru stretched his neck and attacked Sasuke to put a curse mark on him. Sasuke used body flicker jutsu to quickly escape from Orochimaru grasped.
Just when Sasuke landed at tree branch, he was hit by the tail of giant snake. Sasuke was thrown at high speed and crashed at a tree 20 meters away from him. Orochimaru took this opportunity to put the curse mark on Sasuke. He was happy that he succeeded in his objective but he felt something was wrong.
He realized that he was caught in a genjutsu, he quickly released the genjutsu but he was too late, Sasuke was right behind him and he stabbed his sword through Orochimaru's chest.
SASUKE: "Your information was wrong, my taijutsu is indeed very strong but my specialty is genjutsu. You are the first person to know this, you can brag about this in hell when you meet my other victims in future."
Sasuke knew that this snake won't die this easily, if he uses amaterasu and susano then he will be able to kill him but it was not the time to reveal his mangekyou and Orochimaru has other purpose to fulfill.
As Sasuke expected, another Orochimaru came out the sword impaled Orochimaru's mouth. Orochimaru and Sasuke put some distance from each other.
SASUKE: "That is the most disgusting jutsu I have ever seen, and I have seen it with my sharingan now I can never forget it. You disgusting snake, I swear I will kill you."
Orochimaru got serious, he realize that Sasuke has the ability to kill him. Sasuke put him in genjutsu when he tried put his curse mark right after Sasuke used great fireball jutsu at the snake. If he underestimate Sasuke anymore, he will suffer in the fight. He cannot believe that a 12 year old is making him, the legendary Sanin, to get serious.