Fanaelialae
Legend
Okay, but that's a house rule. I'm fairly certain there's nothing about melted plate dealing more damage in any of my 1e books.Magic can be specialized, so the flametongue can be immune to its own heat, but still vulnerable to the magical heat other things. And I can tell you from experience(not since 1e), that I have had PCs burned further by metal armor melting.
And what I was pointing out was that this fireball, which merely scorched the fighter a bit, melted a flaming great sword, which really doesn't make much sense when you look at it critically. Molten metal would inflict horrific burns on any exposed skin.
Not saying you're wrong or anything for wanting to do it that way. Just stating my own opinion on the matter.