On the soul guide chariot, Luan Yu looked at Fire Phoenix Douluo suspiciously.
"Sister, what's wrong? Why are you in such a hurry to leave?"
She could see that Unbreakable Douluo was very interested in Liuxing and Liuying.
This was the perfect time to build a relationship between the two youngsters and Unbreakable Douluo.
Unbreakable Douluo was a well-known, upright individual, meticulous and responsible in everything he undertook.
If Liuxing and Liuying could establish a good relationship with him, their future defensive soul guides, and even the invincible shield, would be assured.
Fire Phoenix Douluo shook her head, glanced at Liuxing and Liuying, and said in a deep voice, "You two, let me see your martial souls again. Just partially summon them; you should be able to do that."
Liuxing and Liuying exchanged glances, then simultaneously extended their hands.
After a year of companionship, they trusted Aunt Feng completely and believed she meant them no harm.
A red flame ignited within the soul guide chariot. Liuxing and Liuying's right hands were enveloped in silver-white mecha, with crimson flames dancing at their fingertips.
"This!?"
Upon closer inspection, Luan Yu noticed something unusual.
The temperature of the flames was extraordinarily high, and there was a ferocity within them, a destructive force that seemed capable of annihilating everything.
It reminded her of the Purple Purplebrilliant Heaven Destroying Dragon from the Sun and Moon Empire.
Fire Phoenix Douluo's eyes widened. She had initially only observed the high temperature of their flames but hadn't anticipated such a potent aura of destruction.
"Destruction attribute?" Luan Yu murmured in surprise.
The fire attribute was already renowned for its destructive and offensive capabilities.
Adding the destruction attribute to it would make their future attack power unimaginably formidable. Luan Yu couldn't help but marvel inwardly.
"It is indeed the fire attribute combined with the destruction attribute, and it's the ultimate fire. You two little ones are truly remarkable!" Fire Phoenix Douluo exclaimed after a few minutes of careful observation.
Her expression was solemn, but the corners of her mouth curled into a smile.
She had already come to regard the two as her own children. The more exceptional their talents, the happier she felt.
Luan Yu was stunned. As an ice attribute soul master, she had sensed the unusually high temperature of their flames but hadn't considered the possibility of it being the ultimate fire.
Fire Phoenix Douluo, however, was different. Although the flame temperature of their martial souls was high, it was still within a tolerable range for their current level.
Yet, the reaction of the Fire Phoenix Sword couldn't be faked. Only an ultimate fire martial soul could provoke such a response from the sword.
This was particularly surprising because their mecha martial souls didn't seem to carry the bloodline of a fire-attribute divine beast.
Luan Yu clicked her tongue softly. If there was anyone on the Douluo Continent who understood ultimate attributes best, aside from Shrek Academy, it was undoubtedly their Sun and Moon Empire.
Shrek Academy's deep understanding of ultimate attributes stems from the fact that several of its past Poseidon Pavilion masters possess extreme attributes.
This knowledge was further solidified thousands of years ago when Shrek Academy led hundreds of Title Douluo to defeat the Sun and Moon Empire's ultimate fire attribute Poseidon Pavilion master.
Historical records describe this master as inhumanly powerful. During his lifetime, even the top ten fierce beasts dared not reveal themselves, and while the Beast God, Di Tian, was not afraid, he hesitated to engage in direct combat with the Poseidon Pavilion Master.
That era marked the pinnacle of Shrek Academy's glory and the lowest point for the Sun and Moon Empire.
The Sun and Moon Empire was forced to pay reparations and rename the Sun Moon Continent to the Douluo Continent under the overwhelming pressure exerted by the Extreme Fire Poseidon Pavilion Master.
This humiliation left the Sun and Moon Empire seething with resentment.
"Sister, having an ultimate martial soul isn't necessarily a good thing!" Luan Yu interjected, her voice tinged with concern.
She recalled that, to her knowledge, soul masters with ultimate martial souls faced a significant bottleneck between levels thirty and seventy.
During this period, their highly condensed soul power caused their cultivation speed to slow to a crawl.
While their peers might advance to levels forty or fifty, those with ultimate martial souls would still be struggling at level thirty.
Although ultimate martial souls grant immense combat power, allowing them to fight above their level and dominate non-ultimate martial souls of the same attribute, the sluggish cultivation speed from level thirty to seventy is a critical flaw.
After level seventy, their cultivation speed can far surpass that of other soul masters, but the delay during the earlier stages can be devastating.
It's important to note that soul masters have a golden age, a period when their cultivation progresses rapidly, marking the peak of their growth.
Once this golden age passes, their cultivation speed drops significantly.
This is why higher-level soul masters often take years to advance even a single level; their age has increased, and they've moved beyond their golden period.
For soul masters, levels thirty to seventy represent the golden age of cultivation and advancement.
The ultimate martial soul's bottleneck coincides precisely with this critical stage.
If a soul master fails to break through to the Soul Saint level during this golden age, even an ultimate martial soul may struggle to grow into a Title Douluo.