Fantasy: Treasures Are Discounted 10,000 Times, I Sell Them Back

What? Thousands of discounts on everything? You can enjoy a 10,000-fold discount on anything purchased in the system merchant domain. The price of magical treasures is only one ten thousandth of what is available on the market. Since then, Lu Zixuan started the "blood vomiting sale" mode! "Junior brother, are you going to attack the Qi-Blood Pill? Buy now for a 10% discount!" "Junior sister, this detailed introduction to alchemy is guaranteed to help you make alchemy in the future. If you buy it now, it only costs 80,000 spiritual stones!" "Fellow Taoist, you and I are destined to sell you this Nine-turn Golden Pill for only 3,000 divine crystals." … Billions of years later. Empress Shendan: "If it weren't for Senior Brother Lu's grace in the past, how could I have achieved what I have achieved today." Ancient Sage Killing the Sky: "Whoever dares to be an enemy of my Brother Lu is an enemy of me!" Countless creatures: "Thank you, Emperor, for your gift!" Lu Zixuan was confused. I just sell some random things, how come the world of immortality is all mine? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.