You can buy your own materials and make them yourself (the spectrum may be given to you, or the angel in colorful clothes may give it to you)

Yes, it's very expensive.

You can also find a vendor who randomly appears in other people's homes to buy it. The 5w of the diced bean MM will never change. However, if you eat another transformation, no matter how long it takes, the transformation effect of Douding MM will disappear.