It can be obtained by the following three methods. 1. Rehmannia glutinosa drawings can be purchased at the auction house. 2. They can be obtained by mining, as follows: Titan iron ore vein-frozen glacier. Titan iron ore vein-solacha basin. Cobalt-rich vein-Zudak. Cobalt-rich vein-Haofeng Fjord, 3. Minerals can be separated (recommended), such as frozen prisms made of jewelry. The frozen prism contains 2-3 excellent gems of grade 80, including topaz.