The Protagonist's Ultimate BOSS

When Yami becomes the BOSS, what kind of BOSS should he be, the anime protagonist BOSS? No, no, fantasy BOSS? No, no, I want to be the BOSS of the three most dangerous species in the universe. A certain reborn person, why, even though I know the plot of the game, I still can't defeat An, An An said, the games are all run on my system, what are you going to do to fight with me? A certain time traveler, why, obviously I already know? The plot is about why I can't beat a native. He said, I have a system but you don't. A certain possessed person, why, even though I have possessed the protagonist, why am I still killed by you? He silently said that I am the BOSS. The three most dangerous species in the universe were hiding in the corner and watching the big devil, trembling. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.