My Sister Disappeared for Three Years and Summoned Me to Be Her Guardian Spirit

Three years ago, his sister fell off a cliff and disappeared. Chu Xuan was disheartened and just wanted to protect his sister in the next life. On this day, my sister's voice suddenly rang in my mind: "Brother! I have traveled to a fantasy world. It is so dangerous here! Vicious beasts are rampant and demons are raging... The system asked me to choose a guardian spirit: Nine Heaven Phoenix, Ten Thousand Years Old Demon, Qinglian Sword Immortal, which one do you think is better?" Bang! Chu Xuan smashed the boulder with one palm: "I will be your guardian spirit! I will pamper you in heaven and on earth!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.