The Magma Storm card tells you to "Burn all faceup cards in this Region and the top 6 cards of the Adventure deck." The Magma Storm card could have said 'all faceup adventure cards' though, and because the card does not say this I'm inclined to think the card burns any and all faceup cards.

1. Do you burn Terrain cards that are face up in the region when the Magma Storm card instructs you to burn all faceup cards, or does Magma Storm only apply to Adventure cards?

2. What if there are Dungeon/Highlands/City cards in the region, do they get burnt as well?

3. What about Purchase deck cards, burnt as well?

It would seem burning Terrain cards would deplete the terrain deck too much.

I can't find anything that says Terrain cards are fireproof though, so it would seem as if the Magma Storm card does burn Terrain cards / any cards in the region.

This only refers to Adventure-type cards, which would include Highland/Dungeon/Purchase etc.

Firelands Rules Page 2

"Terrain Cards can only be removed by effects that specifically remove Terrain Cards."

And I'm guessing Spells like Hex, Barrier and such would also be burnt, right?

Magma Storm should have said "faceup Adventure cards" to avoid any misunderstanding, but the text is already crammed in the box.

Such as it is, I think the way to go is to burn everything, with exception of Terrain Cards, just as talismanisland said.

Thanks talismanisland and The_Warlock. I kept reading those Firelands rules over and over, funny how you can miss stuff when you are pouring over the rules.