MTL - Night Ranger - v5 Chapter 2 God chain

After transmigrating into a beast world, Rong Mingshi discovered that the people of this world experienced widespread mania. For example, when their emotions were abnormally agitated, they would become destructive beasts. If their emotions were abnormally low, they would shrink into their young beast form.

The Halfling says: curiosity is power.The Dwarf says: unity is power.The Elf says: Magic is power.The Gnome says: creation is power.The Beastman says: slaughter is power.Humans say: authority is power.The Dragon always says: knowledge is power.The Gods once said: faith is power.Lynch stands on the terrace of the All-Knowing Tower, overlooking the Anriel Continent, and gently says:“I”, am power.

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates