The Martial God Who Regressed Back to Level 2 - Vol. 2 Ch. 52 - [Season 2 Start]

[MangaDex]

 

[Wintermyth]

Haha, the Solo Leveling name drop, and then he summons a shadow soldier(?) xD
Well, I honestly don't mind other works "borrowing" ideas as long as they do a good job with them.