Actually, two linked portals can be placed below each other. The lower one covers a shallow pit with something desirable. Once you go in, you fall - from the upper portal into the lower one, and again and again and again... until you are rescued, or die. Go to Comment
Another possibility is that the trap is already filled with projectiles loosed by previous victims of the trap- a whirling river of arrows, bolts and magic still hurtling down the passage. Go to Comment
A levitate, fly or similar effect, magic or psionic, could get you out of the process of constant falling.
Plus, I'd see the dungeon "owner" needing to maintain the trap to keep it free of debris and mice and other stuff (read corpses). Alternatively, the magic of the portals could just teleport stuff somewhere else after some time of falling. Go to Comment
I don't know about this. Unless the portals add some sort of "push" to an object when it exits, most normal projectiles will eventually slow down and stop. Even magic projectiles might fissle out, given enough time, and some of those (ie fireballs) are probably subject to the same air friction as normal missiles anyway.
The "one over, one under" configuration would still work like this, though. Go to Comment
Very cute and fun. The part with "I'm hungry" reminded me of the nightmarish Furbys, and overall it feels like a combination of them, Tribbles, and Gizmo from Gremlins, just add glowing. Do they breed at an alarming rate? Or mutate when fed after midnight? Can they be taught to repeat obscene phrases?
The members of the party has unknowingly been infected by a mysterious plague and have been spreading the virus for quite some time now while adventuring. They start to hear rumors of all the cities in quarantine after they travelled trough. Will they discover the source of this? Will people start to avoid them, try to kill them?