The Thayan Menace said:
First, they were on the Prime. Second, they did not bother to investigate these effects.
Let me see if I can make that particular point more clearly.
If I'm adventuring in a "standard" dungeon, and a crossbow bolt shoots out of the wall and hits me, I'm pretty likely to suspect it's a mechanical trap. If the corridor in front of me fills with sheets of flame, I'm pretty likely to suspect a spellcaster or a magical trap. If snaky, magical tentacles burst from the floor, I'm pretty likely to suspect a spellcaster or a magical trap.
If I'm adventuring in a dungeon set inside a volcano, and a crossbow bolt shoots out of the wall and hits me, I'm pretty likely to suspect it's a mechanical trap. If the corridor in front of me fills with sheets of flame, I'm pretty likely to suspect that it's an effect of the volcano before I suspect a spell or a magical trap. If snaky, magical tentacles burst from the floor, I'm pretty likely to suspect a spellcaster or a magical trap - but I might also suspect a strange new creature, reaching incorporeally through the walls and manifesting only its arms.
If I'm adventuring in a dungeon set in a fortress atop an extraplanar beast as it wends its way across the Realms, and a crossbow bolt shoots out of the wall and hits me, I'm pretty likely to suspect it's a mechanical trap. I may, however, suspect that it's an illusionary wall, that there's an arcane archer-type with teleporting arrows around, or a similar, higher-magic explanation. If snaky, magical tentacles burst from the floor, I'm pretty likely to suspect that its the hairs from the beast's back, that the castle is magically ensorceled to try, at random, to grab those inside it, etc.
In other words, the more weirdstuff* the environment is, the more I'm likely to accept seemingly magical happenings as "normal," and not necessarily traps laid out by some other intelligence.
Now I realize that giving them hints may have been helpful, but I do not believe that I committed some sort of gross error that led to the rogue's death.
Well, if you're certain, then you're certain.
* - Oops! Sorry. Edited the swearword.
