MTL - The Fallen Merman - Chapter 145

I reincarnated as a lizard in a martial arts world.“Roar!”“He’s using the lion’s roar!”“To deflect the Ten-Star Power Plum Blossom Sword Technique! Truly indestructible as they say!”“This is… the Heavenly Demon Overlord Technique! It’s a Heavenly Demon, the Heavenly Demon has appeared!”It seems they’re mistaking me for something else.

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

In an alternate modern world, where people could summon their own beastly companions, His journey was anything but ordinary.As the college entrance exams loomed, He found himself the subject of ridicule for his choice of a companion – a small, seemingly inconsequential snowball known as an ornamental pet.“”Little Snowball? Merely a decorative trifle, utterly useless.””“”Why bother with a pet that lacks the capability to evolve?””“”Its potential is pitifully inadequate. It’s destined to remain stagnant for its entire life.””“”Dreaming of the Familiar Academy? Utterly impossible.””He was bombarded with questions, scorn, and derision.But what they didn’t know was his unique ability – he could unlock the maximum potential of any Beast Evolution!With a calm demeanor, he gazed at the pet panel, visible only to him.“”Hidden evolution route!””“”Queen’s Path: a route of boundless potential. It can ascend to the regal King class.””From Little Snowball to Ice Crystal Soul, from Snow Girl to Ice Blue Girl, and ultimately, the formidable Extreme Ice Queen… the transformation was breathtaking.Now, armed with the power to unleash the fullest potential of any beast, he faced his doubters with a bold challenge.“”Who dares to call my Snowball useless now?””The stage was set for an extraordinary journey, where potential defied expectations and a small snowball could ascend to royal heights. Who would have the last laugh in this tale of evolution and triumph?

This novel is also known as I Possessed a Demon Sovereign

Chen Luoyang felt that something was wrong with his transmigration. After transmigrating, he possessed the body of the highest expert in the world, the Master of the Demon Cult, addressed respectfully as the Demon Sovereign.

Generally, aren’t supreme experts the ones that leave behind a wisp of their soul behind and occupy a new body of some miserable low-level youngster then they go on a journey of revenge and make a comeback?!

Or perhaps it would be transmigrating into a miserable youngster’s body and obtaining a cheat slowly walking the road to becoming a God?

But why did his transmigration seem wrong?

Now my environment is full of big shots and I feel like I’m going to be exposed!

- Description from Novelupdates