-----
Seven Demon Kings, each one gradually becoming stronger than the previous one, which also comes with Players having new ways to grow stronger.
It is as if each one sets the stage for the growth of Players, whenever a new one came out, larger Level Caps were released, alongside new mechanics like Skill Fusion and Equipment Potential and Enhancement.
I had researched this online, and most of the things that already were here when I created my account were non-existent in the first versions of the game.
Yeah! Nobody could fuse Skills, Skill Books were also very rare if not nonexistent, people were stuck only with their Race and Class Skills, and Subclasses didn't exist either.
So synergy was the most necessary, and I guess that's why all the pro players that started at the beginning are so obsessed with their "builds" from the beginning instead of just enjoying the game.