Circular Passage with Howling GaleCircular Passage with Howling GaleThis is a stone passageway that can be of any size but typically is twenty feet wide with a fifteen foot high ceiling. The walls are made of cut stone blocks of dark granite. This passageway runs in a complete circle like a donut with doors on the side walls, here and there, leading in and out. There is a constant gale force wind blowing through the passage (a permanent gust of wind type spell) around the circle. The winds found in these passageways differ in severity from a severe wind to hurricane force (depending on how difficult the DM wishes the obstacle to be).Some of these passageways have a very cold wind with flying chunks of ice and snow (there are patches of ice on the wall). Movement in this wind will subject a creature or person to one point of damage per round due to flying ice. See the Dungeon Master Guide for effects of severe winds.
Rolling Stones of Death TrapRolling Stones of Death TrapThis isn't technically a true trap, but more an attack by an animated construct. Still, it is classic and deadly. Place a huge animated stone sphere (animated object in the monster manual) in a passageway only a teensy bit wider and taller than the stone. It will roll around and crush PCs. The beautiful thing is that it is interactive and can reverse course and even roll uphill! It might be rolling continually through a network or maze passageways. There might be more than one if you want it more challenging. For added flavor, have the stone sphere be crystalline, with some nice flashy, sparkly color (like sparkly blue or green). There could be a squashed NPC (complete with crushed gear) to be found somewhere before the encounter begins, just for some foreshadowing. Have fun with this one!
Magic Jigsaw Puzzle DoorThe Magical Jigsaw Puzzle DoorThe magical jigsaw puzzle door is a doorway shaped, six inch deep, niche in the wall. The back of the niche contains lines etched in the stone in a jigsaw puzzle pattern. A pile of associated, magically enchanted, wooden pieces can be placed within the niche where they fit. Each piece will adhere to its proper location when pressed against the wall. Once all of the magical jigsaw pieces are in place and the puzzle is complete, they will form a wooden door. The door is then fully functional and can be opened into the space beyond. Of course, the pieces of the jigsaw puzzle door may be scattered and hidden throughout a dungeon.