He saw Spiderman swinging in the air using his webs and Green Goblin moving in the air using his glider all while both of them exchanging attacks and blows to each other.
With a very sharp and keen observation Karn fixed his gaze on the fight happening right before his eyes.
Because the things that are being used in the fight between Green Goblin and Spiderman are not something that was present in his era.
He knew about Vimans in his era that were used by divine beings and some asurs to fly in the sky and travel beyond the stars.
But it was his first time seeing the goblin glider of Green Goblin standing on top of which he is flying in the air and also the swinging of Spiderman that he is doing using his webs.
On top of all of this he became more fascinated with the weapons that Green Goblin is using in the fight which are the pumpkin bombs which are exploding and the razor bats that are sharp and are being thrown at Spiderman.
For Karna the weapons and techniques of the two fighting foes before his eyes are very fascinating which he has never seen in his own era.
But now in this new modern and advanced world he is witnessing these weapons and techniques that made him very exhilarate to showcase his own powers as well.
Soon he called upon the divine battle axe Rhitta from his heart which immediately materialized in his hand after being shrouded with golden color light.
Before Karna could've have landed his attack the system immediately appeared before him and said...
[ Wait oh great warrior. You just can't attack them. ]
Karna: "And why is that ?"
[ Because if you attack now it will fully risk in revealing your identity. ]
Karna: "So what do you suggest ? Shall I back out ? If that's your idea then forget it. I will never back out."
[ Who said that you need to back oh great warrior. We just need to hide your identity and then you can do whatever you want. ]
The system immediately put the mask on the face of Karna and then it also reverted Karna back to his original appearance with the mask on his face.
[ Now you can attack them oh great warrior. ]
These words of the system brought a proudful smile on the face of Karna that was present beneath the mask on his face.
Holding the handle of the Rhitta with his strong and tight grip Karna delivered a powerful downwards slash with his axe which is one of the abilities of the Lion Sin of Pride called Super Slash.
Spiderman immediately sensed this slash coming towards him. So he immediately used his webs to dodge this attack on him.
Although he narrowly escaped the slash but the same couldn't be said about his foe the Green Goblin who got caught in the slash.
This slash brought upon destruction upto several meters in which the MIT campus sustained a great deal of damage.
And on the other hand the Green Goblin who got hit by the slash directly was completely sent out of MIT and received a very strong damage from which his Goblin armor couldn't protect him.
When the fog of destruction faded away Karna made his way towards the sight destruction that has caught his attention.
Spiderman was on stuck on a wall watched him walking towards the glider of the Green Goblin.
For some moments Spiderman observed Karna and found that he stood before the glider of Green Goblin and after making the axe in his hand disappear easily lifted up the glider and watched it carefully from which sparks of electricity is coming out.
When he was inspecting the glider with utter fascination the system once again came out and told him...
[ This is a great vehicle for you oh great warrior. ]
[ But it has sustained damage from your attack. ]
[ But you don't need worry about it for a second oh great warrior. Just give it to me and I will fix it as completely new and according to your liking. ]
Karna: "Sure take it."
The system immediately showered golden color light on the glider and took it away from the hand of Karna.
From the point of view of Spiderman he saw golden color light getting showered on the glider and then it disappeared from the hand of this mysterious masked attacker.
So to know everything Spiderman swung towards Karna and when Karna has just put one step ahead Spiderman appeared before his eyes while he was hanging upside-down.
Spiderman: "Hey big guy who are you ?"
Karna just looked at Spiderman without saying anything for a few seconds and then he grabbed Spiderman with his both hands and pulled him down by which the web got ripped apart on which Spiderman was hanging.
Then Karna just tossed Spiderman to a side like he was an empty bottle.
Then with the help of the system Karna grabbed most of the weapons of the Green Goblin which he desired to be his own.