Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 2 - 2-7. Demon Return

After annihilating Han, Zhao and Wei empires in succession, the dynasty of Qin is ushering in an unprecedented flourishing age with powerful cultivators emerging endlessly. People take pride in being part of the Qin dynasty. However, Ding Ning, a young lad of humble origin in Changling, Qin, is determined to subvert this dynasty and kill the emperor who breaks in the Eighth Realm.

Sherlock is a new generation Dungeon Lord whose ambition is to become the greatest Devil King and building up the greatest Dungeon in the Underworld.

Yi Ti resented her name. From an early age, she couldn’t get away from the nicknames “ET” and “alien”.

But no one thought that one day, she would actually meet an alien.

Scared by the other, it seemed like she screamed……

She fainted, then fell face down or something like that……

She seemed to have gotten a bloody nose from being knocked out……

She doesn’t remember any of this!!!

The only thing she cares about is that after she fainted, the alien actually dragged her, chest down, back home – does the alien not feel ashamed?!

- Description from Novelupdates

Living things really are ignorant – the greed to obtain the key to knowledge and the fundamentals of energy overpowers them. Little do they know that knowledge is full of lies and energy is the root of destruction. Us, mages, have mastered travelling through space and time. We are invincible, we can turn worlds into dust and you, mere ants, will be wiped out with no trace.

-Mage Adam

An A.I.(Artificial Intelligence) gets reincarnated into a world where he becomes a mage.