MTL - The Manga of Ten Thousand Realms - Chapter 20

Transmigrated into a world where spiritual artifacts are a part of everyone!In this world, beasts run rampant, mysteries abound, and humanity is on the brink of extinction. After a century of struggle, a developed system of power has emerged!After reaching adulthood, women awaken into spiritual artifact forms like knives, guns, swords, and halberds... possessing earth-shattering power!Men awaken to spiritual artifact spaces, forming contracts and becoming summoners.When the two combine, they can unleash power several times greater than their own.Xiao Zhan awakened with an SSS-level summoner talent but was abandoned by his girlfriend due to unforeseen circumstances. However, he was fortunate to be noticed and picked by another school beauty!Yet, Xiao Zhan discovered that his luck wasn't just limited to that...

A few years after graduating, Chen Hui was mediocre and suddenly found himself back in the scorching summer of 15 years. It seemed that it was not just a simple rebirth, but a plug-in was accidentally attached. Money, beauty, and power followed. Easy cool text! …

- Description from novelbuddy

In a world teeming with Titans, Colossals, Gigantic Monsters and Kaiju's, Erian who reincarnated makes his living collecting scraps of low-grade Defective Genetic Serum, realised he transmigrated along with his system.

Follow Erian as he grows to become the strongest Disaster Grade Titan with the help of his Titan System!

Throughout this current life of mine, I will pay no attention to my past lives, nor will I seek future lives. I wish to live vigorously, to pay back debt of gratitude and fulfill duty to avenge, to defeat valiant heroes from all species, and to proudly laugh at all the Gods and Demons of the Six Path of Reincarnation!