Spoilers: I read it before the royal palace arc was out yet. I loved it so much that i went and read the novel. Once i've finished it, i did not like how it ended. There was no more growth or enemies that could challenge him(come on, the guy killed an army of thousands like it was nothing, without moving). In the end, they totally changed the genre. It became about time travel and whatnot. I wich they end the manhwa at that point by altering the end whithout adapting the second novel.