The powder form of several metals can ignite spontaneously in air, allegedly similar to the flame plume of a fire breathing dragon. Scandium is one such metal. It ignites with a brilliant yellow flame. We suggest that you don't attempt this as your pyrotechnic show will be quite expensive and could even be dangerous, unless of course you are in imminent danger as Daenerys Targaryen and her triplets attempt to take over your kingdom. Then we suggest you buy at least three.
We have a very limited number of scandium ingots, available now.