and if it catches fire, it’ll be epic...
My thought exactly. There is a substance called thermite, that once ignited, can burn through just about anything.
Red iron oxide -325 mesh three parts by weight
Finely divided aluminum metal -325 mesh, one part by weight
This compound might not generate much electricity, but man, the heat it can put out.
And neither carbon dioxide nor water will put it out before it is all consumed.