Elf Tensei Kara no Cheat Kenkoku-ki - Chapter 13Book 4: -1: Promise with "Me"

Anyone who could construct a stable Spell Model could become a Wizard — that was the Wizards’ ultimate secret! Having been given a new life as the son of an aristocrat and armed with a super quantum computer from his past life, Spell Models came as easily as breathing to Merlin. With this overwhelmingly huge advantage, would Merlin become the greatest Grand Wizard of all time?

- Description from Novelupdates

A strange dark entity approaches the milky way galaxy. A new era was about to begin and it would choose the fateful one.

Joey always thought that he was unlucky and hopeless. From an early age, he was brought up by the church and ended up adopted by a couple. From then on, his life became not so easy. Poor in studies, abused by his parents.

One day after school, he was hit by a car after saving an old man. “Am I going to die like this? ” He thought. Then the old man suddenly hit his forehead with a strange stone.