After getting the blessings from his father Karna returned to mahendragiri parvat and tomorrow he along with Shon will know their guru dakshina.

In mahendragiri parvat ,
Shon had returned the previous day after getting the boons from tridev's and tridevi's. Today Karna was on his way back. When Karna came all the people were elated to see Karna as he was grow up and had a clam aura like the calm waves water. Karna gave Shon the gandiv dhanush seeing which all were amazed because of the love shared by Karna and Shon.

Gandiv dhanush:-

Jam- Putro I will ask for my guru dakshina from you both first. Putra Karna I bless you with the Saranga dhanush and I make you my successor.

Saying that all the know of Rishi Jamdagni went to Karna. Rishi Jamdagni also gave Karna the Saranga dhanush.

Jam- As for Shon I bless you with the Girish sword of Mahadev.

Jam- As for my guru dakshina I want Karna to capture a kingdom and Shon you shall also capture a kingdom of your choice.
Shon- But Gurudev if we have two different kingdoms how will we spend time?
Jam- You can capture a kingdom and make it a part of Karna's kingdom or Karna can do that. But for some time try and rule your own kingdoms to see if you can handle it or not.
K & S- Okay Gurudev / pitamah.

The people then turned towards Bhagwan Parshuram.

Parshu- Putra Karna I bless your arrows to be 10 times more powerful then others and as a parting gift I bless you with the Bhargav Astra and the Vijaya dhanush.

Parshu- Putra Shon I bless you with your arrows to have 10 times the strength and the Bhargav Astra. I also bless you with the Pinak Dhanush of Mahadev.

Parshu- As for my guru dakshina Karna I want you to teach Bhishma a lesson and Shon I want you to teach Drona a lesson.

The both Karna and Shon taking the blessings of their families went to fulfill their guru dakshina.

After a certain point both Karna and Shon went in different directions.

With Karna ,
He was going in the direction of Avanti as he heard that the king of Avanti was a samrat and also that the king of Avanti was gifted Mathura by Jaraasandh. So with Avanti Karna would get Mathura as well.

He entered the kingdom of Avanti and sent a invitation of war to the king.

King- Haha can't even afford an army you bloody begging Brahmin.
Karna- Do you just talk or fight?
King- Shut up! I will make you my slave after I defeat you.

Saying that the war began and the alliances of the samrat came like the kingdoms of Saurashtra , Kuntibhoj ,  Shurparaka (kingdom founded by Bhagwan Parshuram) , Gurjara ,  Anarta Kingdom , Dandaka , Heheya Kingdom  , Anupa Kingdom , Asmaka Kingdom  and Abhira kingdom.

Karna first started to penetrate the army of all the allied kingdoms. He didn't kill them but use Pashwap astra on them. Seeing this all the maharathis ordered the soldiers to create a chakravyuh. Karna started to penetrate the vyuh and also killed all the allied kingdoms kings.

Karna later turned to kill the king of Avanti. They used swords , axes etc. lastly Karna smashed the head of the king with his mace.

He had made his name as an ati-maharathi in his first war. As he killed 50 akshauhini Sena of the alliances and he had 25 akshauhini Sena left.

He made Shurparaka the capital as it was founded by his father and he changed his kingdom name to Jhansi. In honour of Rani Lakshmi bai.

(Nishada tribes live on the outskirts for now). Dwarka was now surrounded by Karna meaning Karna could stop trades going to Dwarka or from Dwarka. He could stop the Dwarka people going to other places or stop others from going to Dwarka.

With Shon ,
He decided to attack on Magadha. Like Karna he also fought many people and he defeated all of them. He became the ruler of Kosala , Pragjyotisha (bhagadatta) , Anga Kalinga , Pundra (Pundarik) etc.

Tomorrow their other guru dakshina would also happen as tomorrow was the kala pradarshan of the kuru kids.

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Authors note:-

What will happen in kala pradarshan?

Dwarka is surrounded by the kingdom of Karna. What will happen now?

The brothers have a strong kingdom now.

Do you think they will reach before the kala pradarshan or after?