MTL - The Last Gentleman - Chapter 437 keystone clues

Outer Sect Disciple Chen Yu, assimilates within his body a fiendgod heart.

The heart, is the backbone of life, the human body’s fatal vital point. And it can be said that Chen Yu’s heart is actually his strongest defense point, and permits him to overtake demonic beasts, or divine beasts unlimited potential.

Henceforth, he steps onto the stage and surges forth on a magnificent scale, in a heart-rending mysterious journey.

Talented as a cloud, an unparalleled supreme talent.

10,000 races glorious, cross boundary battles.

Only my heart, eternal!

- Description from Novelupdates

In a world where ancient magic has been resurrected. Atlas, an orphan from Earth, finds himself transmigrated into the body of a child and possesses the rare Void Magic. Harboring such power, he’ll walk the path of becoming stronger and stand free in the sky above all existence!The tale of the Legendary Void Walker is about to begin!The cover doesn't belong to me! The title was done by TiramisuAndCoffee!

On the Yuan Continent, fantastic beasts and powerful cultivators exist. Their immense power is capable of shattering mountains and emptying oceans.

On this continent lives John Fenix, an unfortunate youth who is unable to cultivate and wield such immense power. He could only powerlessly look up to others and watch as they soared to heights unseen.

After a fortuitous encounter with a mysterious object, John finds himself able to cultivate. Determined to never feel powerless again, he sets out on a cultivation path filled with danger and excitement. Utilizing powerful cultivation arts found within the mysterious object, John sets out to write his own legend and ascend above all as the Immortal Asura.

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.