Shenyuan Ziye's soul traveled to the world of Demon Slayer, awakened the Ice Breathing Technique, and obtained a system that allows him to level up by killing demons!

After traveling back in time for two and a half years, his parents were killed by evil spirits. Shenyuan Ziye was heartbroken and decided to join the Demon Slayer Corps. After becoming Bingzhu, he began to kill demons wantonly!

Tanjiro Kamado: Yes! Mr. Kamogen is a very powerful person!

Agatsuma Zenitsu: Kamigōnen, is work the only thing on your mind?

Inosuke Hashibira: Damn it! I can't surpass you again? Moonlit Night!

Shenyuan Ziye: Even if my body is destroyed, I will definitely kill the evil ghost!

...........

No heroine, a growing protagonist, invincible in the later stages, weak system, many battle chapters, high-energy throughout..........

(Charizard Invincibility + Red, Green and Blue Two-in-One Template + Pure Idealism)

"You want my tutorial on becoming the strongest in the world? Don't you deserve it? You want my tutorial? And you want to become the strongest in the world? I know that the strongest in the world can only be me!"

Standing before you is the strongest, true rookie in the Pokémon world! The Star of Kanto, Chairman of the Alliance, a figure of dragon and phoenix, the face of the sun and the moon, the leader of the Orange League, the eight-time champion, the master of all attributes, the collector of legendary beasts, the nightmare of rookie trainers, the reaper of random trainers, the master of Pokémons, and the invincible warrior, Xia Yu!

[No realm drop + invincible from the start + decisive killing + no hiding of identity] He cultivated for three hundred years, becoming the renowned Lingtian God of War in the Immortal Realm. Upon his return to Earth, he further advanced, surpassing the Immortal Emperor realm. This time, I, Ye Lingtian, will avenge my grudges and repay my kindness. I am invincible below the Immortal Emperor, and even above him!