Wizarding World Earth Suppliers

My name is Yan Xing, an earthling who can freely travel between the earth and a magical world. The elves liked the silk I brought them, and they also liked the longbow rockets I gave them. The orcs loved the soap I brought them and the growler tanks I gave them. When the human nobles were crazy about white porcelain, they would also install several magnetic storm coils on their manors. Even the undead hope to order a set of high-quality coffins from me so that they can watch horror dramas when they have insomnia. One day... Angels, dragons, and demons found me. I said to them: "My market is open to all races and creatures, would you like some portable Doomsday?"