What? I Was Actually Simulated?

[Fantasy + Immortal Cultivation + Infinite Rebirth + Decisive Killing + No Heroine + No Harem + Kendo] Realm: Qi, Ling, Yuan, Void, Emptiness, Beginning. The protagonist Su Yuan was stabbed in the back by his fellow disciple Yang Bo in the secret realm, and his body perished. Just when he thought everything was over, he was reborn and returned to before entering the secret realm. Using the memory of his previous life, he perfectly avoided all traps and seized the opportunity that belonged to Yang Bo. Later, Su Yuan discovered that he would be reborn inexplicably and retain his cultivation. He used this ability to crazily explore secret realms, challenge strong men, and learn sword techniques in reincarnations. Only one year has passed in the real world, but his spirit and swordsmanship have been tempered many times, and he stands at the pinnacle of swordsmanship in the world. At the same time, he discovered that the reason why he was able to be reborn inexplicably was because he was being simulated? !