Five Dragons Vie for the Throne, but I Alone Am the Martial Saint

A pig's trotter named Traveler is actually a lonely soul from another world who is an alien demon. Where does he get so much compassion? There is not even Yanhuang, national cultural identity? Or Our Lady of Troubled Times?

I thought the "invincible protagonist" tag meant something like Emperor Yang, where the protagonist crushes everyone equally, but it turns out it's a pseudo-invincible novel where someone can actually suppress the protagonist and the protagonist needs to grow stronger.

The description says you become invincible in three days. Is it really that amazing? Or is it just a sham?

Hmm, this is a mindless, light-hearted story; we'll see how it goes later.

The story begins with the protagonist caring for the people and ridding them of evil. A previous dynasty is also established, a villainous dynasty that feeds monsters with the blood and flesh of its people. Then, a princess from the previous dynasty appears.

There are alien species, yet martial arts haven't developed?

It was initially described as a low-level martial arts world, but it doesn't seem like one at all now.

The synopsis sounds impressive, but it's essentially the same old monster-slaying, level-up, and map-changing formula. The first 10 chapters are a methodical introduction to the basics, but around chapter 10-15, after the protagonist forges the Fangtian Halberd, the style abruptly changes, and he starts fighting against ten or even a hundred opponents (this might have been changed earlier).

Upon closer reflection, the problem seems to lie in the lack of a fulcrum. With the protagonist's invincible strength, the martial arts, factions, and villains in this world all feel insignificant. It feels rushed, like a dozen or so chapters of plot are only introduced in one or two chapters, just to get the protagonist into Mount & Blade.

The story starts off as low-level martial arts, with no special combat abilities. But as soon as the protagonist starts training and his strength increases, the previous dynasty starts feeding him increasingly powerful monsters. How did the previous dynasty even have Gundams? How did the current dynasty overthrow them? Is this still low-level martial arts?