The Legend of the Great Devil

The world is divided into seven levels. The protagonist is the prince of the demon clan in the highest seventh-level world. He carries the artifact that destroyed his family and fell into the first-level world. This artifact has two abilities: 1. Cultivating medicinal materials inside can take up to ten years outside in one day. A thousand-year medicinal material can be cultivated in a hundred days. 2. This artifact can copy medicinal materials, and any medicinal materials can be copied infinitely. Let's see how the protagonist uses the artifacts, refining medicine and exercises to complement each other, turning the first-class world upside down, and finally returns to the seventh-class world, setting off a catastrophe!