Isekai Maou to Shoukan Shoujo no Dorei Majutsu - Volume 1 Chapter 2.11

Lu Lingxi died.

As a child born by his parents through precise genetic matching, for eighteen years of his life, he lived entirely for his brother, who had leukaemia. He was his brother’s shadow, a “medicine reserve bank” for his brother’s treatment needs.

Umbilical cord blood, stem cells, bone marrow… whenever his brother needed it, he would have no choice but to quietly lie on the operating table.

Until the last time, when his brother needed a kidney and he never came off the operating table.

When he opened his eyes again, Lu Lingxi became a teenager with the same name Lu Lingxi.

Freed from the shackles of his fate, he possesses the mysterious ability to communicate with plants.

Raising flowers, gardening and running a farm, Lu Lingxi begins a very different life!

She, the “godly doctor” of an assassin organization in 21st century, transmigrated into the body of Yun Family’s abandoned, good-for-nothing Ninth Miss. Good-for-nothing? Then she’ll let the world see what a real good-for-nothing looks like. Summoners are legendary? Nothing is impossible in this world! She’ll become the first Magical Summoner.

In the era of universal mechas, people can go to the endless abyss, collect materials, strengthen and forge their own mechas, and master the power of destroying the world.

Jiang Chen traveled through time and awakened his talent [Immortal Unarmed]. Once the mecha is broken, he can permanently absorb its power and receive multiple bonuses.

…

At the bottom of the abyss, when the Old Demon God finally broke the Titan mecha with great effort, a hand stretched out from the fragments and held down its head.

“Congratulations, you have unlocked my limiter.”

- Description from novelbuddy