I thought it was a kind of skill of the Sword Saint class, or some event that allowed her to level up killing people.

I didn't know killing people gave XP in this manga.

No, that isn't even remotely possible in the setup.
They are far, very far kingdoms from each other.
MC family is just a noble family, not even royalty, they can't even ask for revenge, and the other kingdom is basically Ancient Egypt, where the priest of Ra is a kind of Pharaoh.
Have fun.

But there isn't relationship between MC family and Ra.
Why would they seek justice for him?

I'm talking about sword guy and the priest of Ra.
MC family is irrelevant in the scheme of the gods.

Nah, these 2 gods aren't enemies, they captured him because he came uninvited.

Bro, the art in this chapter was well worth the wait :')

Nice, it's back.

And with thirst for revenge!

Lol, reminds me of when the 12th Elder tried to "kidnap" Raizel...

I kind of forget why is she a traitor.
Money? Sedition? Dungeon treasure? Is it a fake/disguise?

Maybe we are just reaching a Season End and I feel it rushed.

God-class are appearing here and there, MC is hinted to be approaching his masters' strength, enemies appear one after another.

It's hard to see how much longer this can go at this pace.

It feels like the plot writing has become lazier and lazier.
May this be reaching it's end soon?

Looks like Vegeta move from Dragon Ball New Age, drawn by Malik.

Dodoreal is still alive, let's see if Dad handles it, or Foolish Son will be forced to fight him.

If you want a little spoiler: Emperor will try to make trouble for MC, he will make him spar against his personal bodyguard, a peak Enlightened Grandmaster. Sadly for him, MC has already become a Divine Master after absorbing the Fire Qi from the Fire Qilin, the evidence of this is he can use Invisible Sword, something only available to Divine Masters and beyond.

Yeah, go, burn down a forest that "covers half of the planet", that will absolutely work flawlessly.

Is the master surnamed Lovecraft?

Legendary Spear Knight. First season was good, second is goodbye, the plot is all over the place.