After lying on the cool stone floor for a long time, Xiao Yan finally slowly drew a deep breath, his joy nearly uncontrollable. He gently moved his slightly stiff and numb legs and resumed his meditation posture. Taking a quiet breath, he closed his eyes, allowing his mind to gradually sink inward. Inner observation—a supportive skill accessible only to those at the Battle Rank—enabled higher-level practitioners to gain deeper insights into their internal condition. As his mind settled at the level of his abdomen, a palm-sized, milky whirlpool was slowly rotating, with a star-like, milky energy gas layer encircling it. Gazing intently at this small whirlpool, Xiao Yan nodded in satisfaction. Though the whirlpool was currently small in size, the energy it contained was undoubtedly ten times stronger than the nine-stage Battle Qi he had previously possessed. The essence of the Battle Energy of a Battle-User is fundamentally different from that of a true Battle Energy. Before a Battle-User absorbs energy, it is called Battle Energy; only after he has truly mastered the art does the energy he absorbs become genuine Battle Energy. Though the difference lies merely in one character, the gap between the two is as vast as heaven and earth—completely incomparable. With his mind guiding the spiraling energy, Xiao Yan's heart stirred slightly, and a stream of milky-white Battle Energy swiftly separated from the spiral and flowed toward the direction his mind indicated. As he continuously guided the spiraling flow, growing more adept with time, Xiao Yan finally paused his playful movements, satisfied, and gradually withdrew his mind from within. His tightly closed eyes suddenly opened, and the milky-white glow remained in his dark pupils for about ten seconds before gradually fading away. He slightly opened his mouth, exhaled a heavy, drowsy breath, and with that breath released, his complexion noticeably brightened and became more radiant. Twisted his neck, the crisp sounds of bones clicking resonated, prompting Xiao Yan to smile and lift his head, gazing at the medicine elder who floated like a ghost at the entrance of the cave. He beamed brightly, saying, "It's successful!" "Indeed, quite fortunate—success on the very first attempt," the elder nodded, speaking calmly. "Then this is all due to my own strength, isn't it?" Xiao Yan shrugged, suddenly displaying a touch of eagerness, extending his hand with a slightly bashful tone. "Master, please look—now that I've reached the Battle-User level, shouldn't I be receiving a Battle Qi technique?" The elder rolled his eyes, drifting into the cave and slowly settling in front of Xiao Yan, pondering for a moment before speaking with a more serious demeanor. "What technique would you like?" "Hmm, well... that one—quite strange, even more so than the Heavenly Stage techniques—something that can... evolve." Xiao Yan rubbed his head, blushing slightly. Hearing Xiao Yan's words, Yao Lao's face flashed with an inexplicable expression, and unexpectedly, he grew noticeably silent. "Master, what's wrong? Did you perhaps fool me with this technique?" asked Xiao Yan, slightly uneasy as he observed Yao Lao's demeanor. "This technique truly can evolve—this part, I haven't deceived you," Yao Lao said softly. Upon hearing Yao Lao reaffirm this, Xiao Yan's face brightened, and he rubbed his hands nervously, carefully asking, "Then, can I begin to practice it?" "Indeed, this technique is quite strange—it can evolve, no doubt—but the risk is extremely high!" After another pause, Yao Lao sighed. Disturbed by Yao Lao's weary tone, Xiao Yan slowly withdrew his hands, hesitantly asking, "How high is that risk?" "Chuckles weakly, the old doctor shook his head, sighed helplessly, saying, 'Since I obtained this technique, I've never seen nor heard of anyone practicing it. Therefore, I don't know the true answer. However, based on my long experience of living these many years, the success rate of this strange technique reaching its peak seems to be no more than two out of ten...' 'Two out of ten?' His face stiffened, Xiao Yan dryly smiled, 'It can't possibly be that low, can it?' Nodding with a sigh, the old doctor said with a bitter tone, 'Indeed, it might just be that low.' Still chuckling and rubbing his forehead, Xiao Yan remained unwilling to give up. The allure of evolving into a celestial-level technique was simply too great for him. 'Master, could you please explain the general cultivation method of this technique?' The old doctor, with his dry hands rubbing together, hesitated before finally speaking softly, 'The evolution conditions of this technique are closely related to the 'diverse flames' I mentioned to you a few days ago.' Xiao Yan narrowed his eyes, remaining silent and leaning in to listen. "Ah, I also happened to acquire this technique by accident. It originally had no name, though I gave it one—'Burn Decree.' " As he spoke, the elderly pharmacist's face briefly revealed a complex expression, suggesting that the process of obtaining the technique was not as straightforward as he had described. "The 'Burn Decree' indeed evolves over time, but its evolution depends entirely on 'diverse flames' as its raw material—each evolution requires the consumption of one such 'diverse flame!' " His voice was slightly hoarse. "After all, 'diverse flames' are inherently destructive and turbulent. They are rare, appearing only once every century, and even when encountered, who can guarantee successfully absorbing and consuming them?" Back then, to secure this "Bone Spirit Cold Flame," I nearly got burned right out of existence... The most terrifying aspect is that this cultivation technique requires devouring various kinds of "strange flames"... Heaven's sake, just one such strange flame can exhaust and nearly kill a fully-awakened Battle Emperor. I can't even imagine what would happen if someone possessed two, or even more, of these strange flames inside them... Staring at the Medic Elder, whose face was filled with disbelief, Xiao Yan himself was stunned, his body rigid. To evolve by consuming strange flames? Goodness, who knows who's going to be consuming whom—perhaps the very creator of this technique is mad! Though the risk associated with this technique is extraordinarily high, I have no doubt about its potential. If successfully cultivated, I believe few on the Continent of Qi could match it—aside from that small handful of exceptional individuals. Xiao Yan nodded with deep understanding. If someone truly mastered the skill of controlling several different types of hetero-flames, wouldn't even a "Battle Saint"-level powerhouse hesitate before brushing his mustache? Of course, on that condition, he himself mustn't be completely overwhelmed and consumed by the hetero-flames. Looking at Xiao Yan, Yao Lao hesitated and asked, "Now, do you still wish to learn?" Xiao Yan's body trembled, and he remained silent.