Reincarnated

Oscar Sage, and their mages have sacrificed everything—including their lives—for the future of mankind. 20 years have passed, and Oscar Sage opened his eyes to a reflection of himself in the mirror—a level 1 mage who could only use basic spells—and a White Magic Tower currently at risk of being outcast from the League of the Four Towers. Vowing to restore the White Magic Tower to its former glory, the returning tower master Oscar begins his second life.
LOVING IT, LIKE THE MC A LOT

Misato Kyoichiro, the leader of the strongest group of adventurers, the "Golden Seekers," was betrayed by his comrades and left to die.
"I won't just die like this!!"
In his final moments, he activated a reincarnation spell. Kyoichiro successfully reincarnated twenty years later as a student named Asai Kyosuke, a wielder of the "Void" attribute.
SEEMS COOL, AND THE MC HAS AN OP POWER

“It isn’t the strongest who survives. The one who survives is the strongest.”
After being discharged from the military, Jin Seowoon did nothing but play games like a loser. One day, he was invited to the world of “Cloyd Survival,” which resembled a game he enjoyed.
In that world were masters of martial arts, kings from other worlds, and notorious killers…
I LIKE IT, BUT IS LITERALLY FORNITE

His talent was forged on the battlefield, but before he could fully develop it, he died.
However, when he opened his eyes again, he realized he had been reborn as Dane Sogres, the youngest son of a prestigious count.
The talent he now possessed… was not limited to just one field?!
I LIKE IT, THE MC IS SO CUTE

In a world that has already been destroyed by death and despair, the legendary Sword God, Karserian Le Vandeiyan, fought until the end. Just as all seemed lost, he is transported to another world — Earth — which has not yet fallen. Monsters are starting to appear, but humanity remains unaware of the looming danger. To prevent history from repeating, the Sword God inhabits the body of a weak human and vows to protect that person’s family.
I LIKE IT, THE MC IS SO COOL AND STRONG