Ascending to Lord-class

[You earnestly explained the detrimental effects of prolonged high-intensity training on children, but Morli remained unconvinced, vehemently arguing his opposing viewpoint.]

["Those are ordinary Oni brats - how can they compare to His Majesty? Mentor, I believe I can increase my training load. The current regimen is insignificant."

Despite Morli's obstinance, you remained composed: "True top-tier warriors aren't mere brutes. Reducing your training allows time for more crucial lessons that will enhance your strength."]

[Your reasoning successfully redirected Morli's focus. He agreed to moderate training while learning leadership and governance - skills you deemed essential for a future ruler.]

[Fortunately, Morli quickly immersed himself in these studies, progressing rapidly. His aptitude fostered ambitions of eventually utilizing his talents, recognizing his potential as a formidable asset despite inherent dangers.]

[Year Twenty-One: After seven months under your tutelage, Morli's transformation was remarkable. His demeanor had matured significantly, shedding childish traits while developing profound respect for you. The more he learned, the more he recognized your superiority, understanding his father's wisdom in assigning you as mentor.]

[Year Twenty-Two: The Oni Sovereign departed, entrusting you with Morli's guidance during his prolonged absence. This development unsettled you, prompting preparations for potential upheaval. Despite your army's strength, you recognized their limitations against true powerhouses.]

[That year, internal conflicts erupted among Oni territories. Amo's father, Anara, seized the opportunity to harass your domain. Rather than distress, you viewed this as Morli's trial by fire.]

["Anara's forces advance along three fronts. I intend for you to counter one, assisted by Gobuma. Though only Peak Chieftain-class, his experience and composure will prove invaluable. Consult him on any challenges."

"Yes, mentor."

"Which front will you engage?"]

[Reviewing the battle map, Morli analyzed Anara's simplistic tripartite assault - land, sea, and air forces operating independently without coordination. After careful consideration, Morli selected the aerial contingent, his preparations earning your silent approval. Though his first command, his strategic approach appeared sound.]

[You resolved to reprimand Morli severely if defeated, as Oni arrogance and outdated tactics made victory nearly assured with proper execution. However, you prepared for potential failure, trusting only yourself completely.]

[Engaging Anara's forces, your superior tactics and experience overwhelmed his armies. Your personal duel with Anara ended evenly, though you recognized his slight advantage as an elite Lord-class opponent. Being near Peak Lord-class yourself, the marginal difference posed no immediate threat.]

[Soon, Morli reported success. Facing total defeat, Anara sent a surrender ultimatum, offering clemency if you capitulated before final confrontation.]

[Anara's proposal amused you. While unable to eliminate him currently - uncertain of the Sovereign's return and lacking sufficient strength - you sought Ōtohime's alliance. Surprisingly, despite your marital relationship, she refused.]

[Ōtohime's rejection didn't shock you. Her attraction stemmed from physical appeal rather than genuine affection. Moreover, your rapid advancement had eclipsed her control, potentially rendering you a rival.]

[Though initially disheartened, you quickly regained resolve. Without Ōtohime's assistance, Anara's demise would simply await your Lord-class ascension.]

[Six months later, you crushed Anara's forces completely. Unable to accept defeat, Anara challenged your entire army alone. After seven days and nights of combat, he fell from exhaustion, though your forces suffered heavy casualties. Claiming his territories and treasures, you secured significant resources.]

[Year Twenty-Three: Utilizing Anara's treasures, your power increased substantially.]

[Year Twenty-Four: Through Anara's resources, you reached Peak Lord-class.]

[...]

[Year Thirty-Three: Breaking through to Lord-class, you evolved into a Nether Oni-Goblin Hero. Standing five meters tall with significantly enhanced power, your level cap exceeded standard Lord-class by ten levels (beneficial mutations consume three level caps per evolution).]