As An Immortal, I Only Learn Forbidden Skills - Chapter 1249:

At some point in the 21st century, the Christian God stopped listening to the prayers of humanity. Monsters with colossal strength and endurance began to emerge and humanity entered its darkest period.

A Mysterious continent, with many powerful sect and countless strong one. Juvenile Zhou Heng with a mysterious black broken sword, from the original stone town out into this world of war. Ascended the throne of the world with only a sword in hand.

- Description from Novelupdates

Eren Idril died as an old, decrepit, and piss-poor adventurer by the maws of a D-Rank monster. He had a lot of unfulfilled dreams and desires that couldn't see the light of the day after the light in his own eyes died down.

But fortunately for him and unfortunately for the world, that wasn't his end. Eren was somehow dived back in time when he was a mere teen, attending Lionheart Academy for adventurers.

When life gives him a second chance, Eren decides to exploit it to its fullest. Experience his vile deeds as he partakes in them without feeling the slightest bit of hesitation.

I was born in Japan and inherited a temple at the beginning.The system is activated at the beginning, which can enhance everything.“Ordinary Buddhist Scripture” enhanced to “Medicine Buddha Sutra”Recite the sutra ten thousand times, and you will become a Vajra!“Vajra Pestle” strengthens “Vajra Indestructible Root”The most rigid and masculine, indestructible!“Eight Divisions of Heavenly Dragons” enhanced to “Great Heavenly Dragon Visualization Method”Great Heavenly Dragon, Prajna Buddha!The widow haunted by evil spirits, the eight-foot-tall adult…“I don’t know if I can bear it.”“Demon, I want you to help me practice!”