Kalran: Tales of the four nations/Hellfire oil

During the Dwarves war for independence in the third age they were one of the many who had witnessed the might of the Dwarves weaponry. And in the fourth age began looking into how their gunpowder weapon, especially once the Dwarves gave them.

But during their research into it they find out that, while powerful, wasn't suited for their style of combat, and needed something stronger. Thus came their hellfire oil.

Using a special mixture of divine alchemy and special oils. Hellfire is a special oil that, once hit with a single spark, explodes with a flame so hot that it transform into plasma, burning hot enough that nearly everything hit melts.