DxD: Building A Demon Clan From Scratch. - Chapter 262: Broken Shackles

Traveling to the wizarding world, Eli found that he was an Eternal.

Life is infinite, life is immortal.

“What? The talent is very poor, then I will meditate for ten years, centuries, and thousands of years, and I can always meet the promotion requirements.”

“This skill is hard? Oh, let me study it for decades to see if it’s really that hard?”

“Consuming life force, improving mental force, and this kind of good thing.”

“The enemy is here? Oh, let me find a place to hide for a thousand years, until his lifespan is exhausted and his mental power dissipates, and then I will come out again, free and endless void.”

…

This is the story of an immortal who lives in the wizarding world and then kills the endless world.

- Description from novelbuddy

Collection of short stories.

- Description from Novelupdates

Oscar, a destitute young boy, died in a tragic accident and was reborn in the forgotten realm. As a member of the lowly Birch tribe, his solace comes from the fragments of a guardian's spirit, residing in his soul. After the decimation of his family in the hands of a powerful race known as the dreads, he embarked on the part of revenge, leading him to the path of transcendence.

As the final dragon lay defeated, Aaran stared at the sky while the rest celebrated.[Awaiting the gods’ response...]He clenched his fists, his heart pounding. A shred of hope flickered in his eyes, only to be extinguished like always.[The attained outcome was deemed unsatisfactory.]Aaran had seen the message for the twentieth time. He had become the gods’ plaything in their desire to witness the “perfect ending”.He regressed once again, but this time as a toddler and charm being the only stat he had.But something was amiss. The world he remembered had changed. Powers that did not exist before had taken hold of the world.Tired of following the traditional route, Aaran chose to fight darkness with darkness… as the gods’ chosen necromancer!