1. Find and get the "molten image" props at the level of "The Prequel to the Chivalrous Man".
2. Place the "fusion statue" in a suitable position in the checkpoint to ensure that there is enough space around for the statue to use.
3. When the role needs to be changed, put the current role near the "casting statue", and then press the corresponding button according to the prompt to put the current role into the statue and get a new role immediately.