I'm basically looking for a novel/manga/manhua where the Protag was someone OP before death and for some reason (revenge for being betrayed, died cause he was old, simply got bored and wanted to reincarnate) gets reincarnated and has to traverse this new world while building his strength from scratch back to where it used to be before he died using his previous life power and knowledge. I can't really explain it well for what I'm looking for lol but I'd like a noble setting where he's looked down on at first and ends up getting memories from his previous life or just born as a third son or commoner and builds his rep up to legend status. Romance is cool, harems are fine but I'd prefer more of an Action centric novel (if it has great romance or Harem that's more than "generic girl #67" then it's all good) I'd prefer novels, doesn't matter if it's NU, RRL or Scribble, just have it completed or at least updated regularly.
Warlock of the Magus World Doulou Dalu (one of the best) History's Strongest Senior Brother King of the Battlefield Dungeon Defense (not what you're looking for but trust me it's good) Kill the Hero The Nine Cauldrons Death Mage The Second Coming of Avarice To Be a Power in the Shadows Tho in my opinion what you're looking for is extremely generic, I do agree that the face slapping afterwards is satisfying lol
like half of these aren't reincarnation but you are right most of these are awesome Personally, I recommend second coming of avarice it is absolutely amazing I wish for everything I have it had more chapters. Also, Duolou Dalu is the shit
The path towards heaven by Mao ni The Second Coming of Avarice The Nine Cauldrons Warlock of the Magus World but not OP before death