Who killed Superman poros with one punch?

I think an unknown Oracle killed Superman poros with one punch. Poros's name, I believe that the students of Superman with one punch will remember it deeply, that is, the big brother who is often teased by one punch and drives a flying car. With the protagonist's Bgm, he said the blood oath that the protagonist should say, played the most powerful boss, and finally turned to dust. I believe that poros's battle against Saitama cannot be forgotten. The purpose of his coming to earth is to find an equal opponent. How lonely and invincible he is, he will eventually be unexpectedly defeated on the earth. And poros can go to the earth so accurately, thanks to the guidance of a cosmic prophet. Could this prophet be lying to him?

According to poros, before he came to the earth, he had done great damage to the universe, just like a group of pirates. He is a typical villain. Later, because I was too strong to have an opponent, I felt bored. I happened to meet a fortune teller who predicted that there was an opponent on this planet, and it would take 20 years to arrive. I'm afraid I'm not stupid enough to believe this prediction. Then he went, and his opponent was in a good mood. I don't know, but poros died in a good mood and never went back.

Why is it so coincidental that he didn't appear earlier or later, and lured him away when no one could beat him? It takes most time to walk back and forth. People in poros say they can't trust the prophet. I think this is a wise choice. I don't know whether the prediction is accurate. Just like this trip to the earth, what is hearty and what is equivalent prediction is deceptive. So, did the prophet foresee the appearance of Saitama?

Maybe it didn't predict Saitama, just to separate poros? This is also very possible. I don't know when the prophet can predict the existence of the breakthrough limiter. Of course, I don't quite believe this statement. Can only be used as a reference. Even if the cosmic prophet can't predict the existence of Saitama, it will make money. It will take 40 years to come and go. By then, he may be old, but poros still can't find himself. So I think an unknown Oracle killed Superman poros with one punch.