Once Bitten, Twice Shy - Chapter 13

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.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Damian, a Centurion of the Punishment Unit of the Baroque Kingdom. “Damn it.” Just once. If I were given just one more chance… ‘I would have truly conquered the battlefield with these guys.’ At the age of 30, he closed his eyes on a nameless battlefield. But when he opened them, he found himself back 17 years in the past. And this time, he had a perfectly functioning mana core that could wield magic. ‘This time.’ I will rise higher than anyone else. I won’t be swept away by the turbulent times. ‘I will conquer.’ Damian, who has returned to the past, wields his spear toward the world.

“From death to becoming the master of death, that's my story”[... ]Jake never got a break. Born unlucky, lived cursed, and died alone—struck by lightning on a rainy night. That should’ve been the end.But fate had other plans.In the space between life and death, he meets the goddess of Karma and Fate, who admits his entire life was a mistake—her mistake. To make amends, she offers him a second chance in a brutal new world ruled by magic, martial arts, and monsters.Before he's sent off, Jake draws from five Legendary Cards—and chooses the most powerful of them all: The Legendary Necromancer.Now, Jake awakens in a world where strength decides everything. With his unique talent, he can summon undead endlessly—and harvest power from the souls of his enemies.[You have enough Soul Shards.][Undead Dragon summoned.]But Jake is suddenly thrust into the Hundred Trials that comes once every hundred years in this new world, a deadly proving ground for the elite.To the others, he’s an outsider—unregistered, unknown, and unwelcomed. A threat to be erased.But Jake didn’t crawl out of death to get killed againLet them come.He has death on his side.