My Cultivation of Immortality Depends Entirely on Keywords

"Slash Loulan with your sword, shoot the wise king with your bow. A single man is in trouble, and his seeds are gone." Li Fan bent his bow, and Yu Maodun, the leader of the Huns, was shot through the heart with an arrow. At this point, the legend of a generation came to an end. "Congratulations to the host, you have killed the enemy's supreme leader, and the system is officially activated. This system has no name, and the method of use is left to the host to explore by itself. I wish the host a happy time travel! See you next time!" A ding sounded, and Li Fan officially got the biggest cheat in his life, and he had hope of returning home. … It is me who is ruthless and unjust, and I am also the one who is sentimental and righteous! I can give up everything in order to become an immortal. After all, only by becoming an immortal can I return to my hometown and see my family. The code of conduct is to either not do something or do it absolutely, otherwise you and I will eventually become stepping stones on the road to immortality for others, and I am destined to compete for the top spot!