Prince Bojji

All humans transmigrated to a parallel world, where every one of them was a king with the territory.
They participated in a game called The Ranking of Kings and fought to become the best nation.
The rankings were determined based on various aspects such as military, technology, commerce, culture, and religion.
In the game, the kings would awaken different attributes of the land.
Someone exclaimed, “My Renewable Resources attribute allows me to enhance raw materials such as timber and minerals. I want to build the strongest empire of commerce!”
Another king challenged, “My King of the Undead attribute allows me to summon dead souls to fight for me. Who dares to stand in the way of my troops of one million undead?”
The third king declared, “My Integrated Production attribute will ensure that technology is being implemented efficiently. You foolish barbarians, watch as my nation advances a few centuries ahead of yours.”  
The fourth king said, “My Miracle Summon attribute can increase the efficiency of evangelism by 1000%. I look forward to the day when my nation becomes the top religion in the world.”
…
Li Xiang revealed a pondering look as he looked at his attributes shown on the virtual data panel.
[Attribute 1: Devils' Den (SSS rank, unique)]
[You acquired the original birthplace of the Dragon Clan. All the legendary dragons are now under your command.]
[Attribute 2: Devouring Lands (currently A rank, evolvable)]
[When you annex the territory of other kings, you seize their attributes as well. Furthermore, you can level up these attributes to even higher ranks.] 

Ranking Of Kings: My Land Is SSS Rank

Upgrading the skills from Level 1 to Level 10 consumed 100,000 of his soul points, and leveling up from Level 11 to Level 20 used up 300,000 of his soul points. He had spent a total of 800,000 soul points.

[ High-rank Splatter Halo, Level 20, spatter range 2 meters and 20% of the skills' damage. ]

[ High-rank Explosive Halo, Level 20, the explosive damage is 20% of skills' damage. ]

"20% of skills' damage ratio is a little low, but I can only afford this for the time being. I destroyed a Mythical beast's lair, killed tens of thousands of wild monsters, and obtained less than 200,000 soul points. It's still not enough to level up a single skill!"

Li Xiang began to level up the castle.

This time, the crystal coins he had spent had already reached 100,000, other than the requirements he had met.

[ The castle has met the requirements for leveling up. Do you want to level up? ]

The Main City to Level 5