Just got into/read through this story in the last week and damn it's good. Feels sort of similar to Tower of God in that the main character is a completely overpowered badass, but it makes itself unique by constantly interjecting humor into otherwise serious situations. The author is absurdly skilled at that and it just gives it a flair no other manwha or manga I've read has had. On top of that, Frankenstein is one of my all time favorite characters, the perfect mix of powerful, insane, loyal, reasonable, and responsible. Even though his character is all over the place, the writer manages to make sure that he's consistent. When given a certain stimuli, he will respond a certain way, not just randomly. Check it out if you haven't, worth a read especially if you are a fan of Tower of God or similar stories.