DracoSuave
First Post
That's only true if you design the dungeon specifically for that sole party to face.
In my campaign, I made a dungeon that was 8th? level. It was to challenge the 8th level PCs. It was populated by a cult of Orcus, meaning lots of undead for the radiant-damage-free party. There was a TPK in that dungeon.
And as a DM you chose that dungeon for that party.
The party started again at first level. I didn't change the dungeon at all. No matter what composition the party had, the dungeon would stay the same. If they had buffed up on radiant damage, still the same. No radiant damage? Still the same.
And as a DM you chose that dungeon for that party.
The key point is that an impartial DM running a world meant to challenge the players doesn't mean that an encounter difficult for melee PCs is an anti-Fred encounter, or that an encounter with undead is a pro-Claude encounter. It just means that the players have to deal with what they face (which is usually by their choice), nothing more, nothing less.
That's using 'impartiality' as a way to abdicate responsibility for your own setting the story. Your job as a DM is not an impersonal one, you are not a mindless game server. You have the right to, in some way, tailor adventures to your party, whether or not it is to their advantage or disadvantage, it is still supposed to be personal.
Choosing to be 'impersonal' is still making a choice in that regard. And if you have a dungeon full of things your party can't touch, you still made the choice to run that dungeon for them, and you are still responsible for it.
Impartiality is a choice, and choices do not abdicate your responsibility.
You can put anti-magic in a dungeon without it being specifically anti-Mark. "To the west is the dungeon of the Mad Overlord." "What do we know about him?" (roll, roll) "Well, he hated mages and dedicated his life to killing them. People say that magic-draining creatures and traps fill his dungeon." "Okay, let's go somewhere else." "Cool."
Right, at which point you hardly need rules for anti-magic stuff now do you?