This was a Demon Beast that wasn't particularly powerful within the walls.
What Ye Tianfan hadn't expected was that it would actually appear outside the walls.
Could it be the same as the Heaven-Swallowing Python? It came out by accident?
Ye Tianfan indeed had many doubts in his heart; in fact, it wasn't just him—everyone present was full of questions.
After all, they had run into wall-inside Demon Beasts one after another. Although there were many types of wall-outside creatures, all of them were originally wall-inside lifeforms that had been infected during previous wars; that was why such things existed, and those wall-outside creatures had already almost completely shed their original appearance from within the walls.
Basically, when you encounter a wall-outside creature again, it's very hard to judge what kind of creature it used to be just based on what it looks like now.
But the Thunderfire Beast currently before Ye Tianfan and the others was different, because apart from its blood-red eyes filled with the desire to kill, nothing else about it had changed.
In other words, it was obvious that this Thunderfire Beast, like the Heaven-Swallowing Python from before, had only recently entered the world outside the walls—it hadn't yet been eroded too deeply by the Demonic Qi, Evil Qi, and other negative auras outside.
Those energies had only just corroded the Spiritual Power in the Demon Beast's body, turning it into Demonic Qi, Evil Qi, and other negative auras, and were still slowly eroding its flesh.
But to completely change their appearance takes a very long time, only then can those creatures polluted by Demonic Qi, Evil Qi, and such negative auras slowly be transformed.
Of course, this span of time wasn't much for Cultivators like them; it could only be called a short period.
And precisely because of this, Ye Tianfan and the others felt that this Thunderfire Beast hadn't been outside the walls for long, since none of its outward features had changed—only its eyes were filled with killing intent.
Ultimately, this meant that this Thunderfire Beast's strength was not much higher than that of the Thunderfire Beasts inside the walls, at most one to five times stronger, because the buffs from Demonic Qi, Evil Qi, and other negative auras were simply too great.
Of course, the Thunderfire Beast's base strength wasn't very high to begin with, so even if it got one- to five-fold stronger, its overall power still wouldn't count as particularly strong; you could only say the Thunderfire Beast's strength was barely passable.
Even Ye Tianfan in his current state could fight this Thunderfire Beast to a draw—of course, on the premise that Ye Tianfan was extremely cautious.
After all, Ye Tianfan was someone who possessed the Power of Laws, so he could kill this Thunderfire Beast. But if it were anyone else fighting this Thunderfire Beast, they could only rely on pure Spiritual Power, because only pure Spiritual Power could truly damage this Thunderfire Beast for them.
There was no helping it; if you wanted to comprehend the Power of Laws, you had to advance to the Primordial Beginning Realm—this was unavoidable.
Of course, it was also possible to comprehend the Power of Laws without having entered the Primordial Beginning Realm yet, but in those cases it was basically like this: you realize the Metal Law today, and within a couple of days you advance to the Primordial Beginning Realm.
That's how realistic it is, and that's how fast it is. After all, once you comprehend the Power of Laws, you directly connect to the Power of Heaven and Earth; before comprehending the Power of Laws, you were actively refining Heaven and Earth's Spiritual Power for your own use.
But once you comprehend the Power of Laws, the Spiritual Power of Heaven and Earth will take the initiative to convert itself into the Spiritual Power you need and be absorbed by you.
This is the difference between the two. For example, if others want to cultivate, they have to actively absorb Spiritual Power themselves; but if Ye Tianfan wants to cultivate, he doesn't need to actively draw in Spiritual Power—those Spiritual Powers will automatically be refined in advance and flow into his body.
After all, Ye Tianfan had already comprehended the Power of Laws. Although his strength hadn't advanced to the Primordial Beginning Realm, because he had grasped the Power of Laws at a very low cultivation level, Ye Tianfan himself already possessed part of the abilities of someone in the Primordial Beginning Realm.
Of course, if someone in the Primordial Beginning Realm didn't actively absorb Spiritual Power and only relied on Spiritual Power being passively drawn in, that speed alone could catch up to the active cultivation speed of someone in the Ten Directions Realm.
It's easy to imagine how fast their cultivation speed would become if someone in the Primordial Beginning Realm then continued to actively cultivate on top of that.
Naturally, anyone who could advance to the Primordial Beginning Realm was an exceptional genius, so it was only right that their cultivation speed was fast.
However, although Ye Tianfan had also comprehended the Power of Laws, his strength really wasn't that high, so the speed at which Spiritual Power took the initiative to pour into his body wasn't very fast—only equivalent to the active cultivation speed of someone at about the first or second layer of the Thousand Source Realm.
Of course, although that speed sounded quite fast, for the current Ye Tianfan it was still very slow.
It was like being extremely thirsty and needing to drink a huge bucket of water to quench your thirst, yet you were only sipping it bit by bit through a straw, which simply doesn't relieve your thirst.
And Ye Tianfan relying solely on Spiritual Power passively drilling into him was just like sipping through a straw; it didn't have much effect.
At most, it only increased Ye Tianfan's cultivation speed from one to about 1.1.
It was useful, but not by much—at best, something like icing on the cake.
This time, after seeing this Thunderfire Beast and observing it carefully, Ye Tianfan realized that with his current strength he could completely handle this Thunderfire Beast.
Ye Tianfan immediately told the Primordial Beginning True Person that he wanted to fight this Thunderfire Beast. After all, having come outside the walls, how could he not fight a wall-outside creature and experience for himself what it felt like to battle such a being?
This time, the Primordial Beginning True Person did not stop Ye Tianfan, because he also felt that Ye Tianfan absolutely wouldn't lose. This wall-outside creature—this Thunderfire Beast—was only so strong; in the eyes of the Primordial Beginning True Person, it was something he could crush with a single finger.
So the Primordial Beginning True Person didn't stop Ye Tianfan from tempering himself. However, he still remained on guard at the side, because who knew whether this Thunderfire Beast might have gained some kind of skill outside the walls that no one could react to in time?
This was not impossible, because some wall-outside creatures possessed special abilities by nature, and these special abilities were things they evolved after living outside the walls.
So basically, any wall-outside creature that had lived a long time would have a special ability, because that special ability was their capital for survival.
As for those wall-outside creatures without special abilities, in order to stay alive, they would desperately seek to mutate themselves so as to gain one.