Hello guys I'm looking for a novel where planar war exist immediately. (World Vs. World) not as an end game content. Like City of Sins.
https://www.novelupdates.com/series/seoul-stations-necromancer/ World Keeper https://www.novelupdates.com/series/dimensional-sovereign/
Age of Adepts has planar wars as a side bit for getting wealth, power, and knowledge. The first one starts in the first 400 chapters.