As Sukuna in Invincible - Chapter 79: As I said, and promised

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

Rebirth, wear a little girl, do not have to be noisy, open your eyes and split your home, with a space of spiritual liquid, Lingquan! Make a big profit!

All kinds of essential equipment! However, can you not do so much! The dregs and the mother’s baby are too poor!

Farming must be standard! Can you order less? The environment is not safe! The landlord of the seven disasters is too ‘healing’! Which pro, your good prince is not right, what mess! This is a kind of field text, can’t be a palace! You have fished the world!

- Description from Uukanshu translation

When Lu Wu opened his eyes, he found that the world had changed completely.The world before him did not have fancy magic, nor ultimate Dou Qi.What it had were summoners that form contracts with summoned beasts.And coincidentally, he was such a summoner, although not a professional one, and his first summoned beast was a piece of crap.But that was fine, because he also had a golden finger!

Once an imperial princess, now reborn among the lowest of s*aves of the nobility.