It's Just a Kitchen Knife, but It's Actually a Saint's Weapon?

"Ding, after signing in today, I will reward the host with a kitchen knife..." Three years ago, Lu Chen traveled to the fantasy world and awakened the sign-in system. But this sign-in system is very useless. Every time you sign in, you will be rewarded with either a wooden box, some scrap metal, or some old books. Today, the system rewarded a broken kitchen knife as always, and Lu Chen was going to use it to chop some firewood. But on the road, they suddenly met a man covered in blood. Lu Chen gave him the kitchen knife out of good intentions so that he could defend himself so as not to die in the wilderness. ... I am Xia Wuji, from the Eastern Region, the Holy Son of Taixuan Sect. Today, he was chased by the ancient royal family and fled to a wilderness. Just when I was severely injured and about to die, I was lucky enough to meet an expert hermit who gave me a saint's weapon. After some thanks, the master left. I held the kitchen knife and took the initiative to find the ancient royal family who were chasing me. In an instant, the heaven and earth collapsed, and the sun and moon fell! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.