I Killed the Dragon and Entered Taoism in Gaowu Tang Dynasty

I have a sword that can cut the world's dragon veins! During the Tianbao period of the Tang Dynasty, treasures were everywhere, and the whole country was prosperous. However, beneath the glamorous appearance, an unknown conspiracy quietly unfolded. A mysterious little tree, under Gu Miaowei's careful cultivation, became the mainstay in supporting the national destiny of the Tang Dynasty! See how I can use my rotten body to slay evil spirits, kill family members, denounce treacherous ministers, and quell national calamity! The imperial concubine poured wine and Taibai danced with his sword. Mr. Miao, standing on the top of the city with one sword, can stop a million troops!