Scrying with a Crystal Ball

[Hassassin]

And, of course, there's the question of "now what happens when the caster spent that prepared dispel magic on debuffing a magically-inclined opponent before they encounter this situation?" - non-bypassable trap, now, and the party rogue cannot do his job because you specifically set things up so that in order for the rogue to do his job, the party caster had to also add a very specific daily resource.

It isn't always necessary to bypass traps. The rogue could just disable one and take the hit from the other, a barbarian could go ahead and sunder both, or if one of them deals elemental damage a spellcaster could cast Resist/Protection from Energy on the rogue.

In any case, I don't think "getting stuck" should be impossible. Sometimes the party will need to regroup if they want to keep plowing ahead - unless they get creative with the resources they have.

This type of thing is generally going to be a relatively minor shift in spotlight time... but the casters already tend to get a disproportionate amount of it.

There is probably a difference in play style here, but in our campaigns rogues (especially talkative ones) tend to attract more spotlights than most casters.

Actually, the trap cost rules are quite explicit in them being linear for adding more traps.

Ok, fine. Then I could design it like this:

Chain trigger
A magical trap with a chain trigger is connected to another trap so that both go off simultaneously if either trap is triggered or disabled. A trap with a chain trigger requires the casting of contingency during construction. To chain more than two traps, a contingency is required between each pair in the chain.

Now the cost is exponential (N!/2 spells), and there's a good reason they are expensive (6th level spell).

 

[Nagual]

Dungeonscape?

 

[LiL KiNG]

Dungeonscape?

A 3E D&D book (easily found with google images) that deals with, well, dungeons. Has a lot of new gear and special substances designed just for being down in a dungeon.

I originally bought the book just to have the in-hand reference for the Rogue's Penetrating Strike alternate class feature (mandatory on any rogue I make from now on) as our group allows any D&D book, but you must be able to provide the reference for all to see (most everyone has gone over to PDFs now though as you can put the whole library on a single external harddrive, ipad, or whatever), and didn't look much further through it than that.

Dungeonscape also has the Factotum Class in it. While not really appealing to me, I know lots of people who like it. It also has the Dungeon Lord PrC which is pretty awesome for a BBEG in charge of a dungeon, and one of the many things I initially didn't even notice.

Looking back through the book now it really does offer quite a bit cool info for running dungeons as a player or DM.