Traveling Through Another World, I Am Actually the Son of Luck

(A different world + practice + plot + fate + system + not brainless) This system is not very reliable, it seems he can only provide information This system is quite reliable. It can be used as a famous sword, but it is a bit useless. He is not the only son of fate, but one in a thousand years The last son of destiny was surrounded and killed a thousand years ago, leaving a "odd and even unchanged" seal waiting for the next person to come and unlock it. It's been a thousand years and the seal is still there. Is there no one in this world who can do math? Son of Destiny: "It's been a thousand years, how about a buddy from Blue Star?"