Top 9 in Top 10 Best Manhwa.
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Author: San G.
Number of chapters: 26+
Status: Updating
This story begins with the idea that the dead can't speak so the living can create whatever they want. One day suddenly the world fell into despair. Some unknown monsters have attacked the earth, they are called "Calamities". They destroy everything in their field of vision. Humanity loses all hope and when everything comes to an end, they appear. They are 12 humans sent by the "Saints" to save the earth. However, a 13th person appeared, who had no connection with the gods and was much stronger than the others. His name is Lee Geon. When the world was almost saved, 12 people betrayed Lee Geon and falsely wrote about his death in the strongest dungeon. What if Geon comes back from there after 20 years? Yes, he returns and promises to kill each of those "Saints." So the story of revenge began.Story link : https://returnofdisasterclasshero.com/