127 SLIPPERY ROOM. The floor in the center portion of the room is extremely slippery with hard ice. To the left and right are wide pits, twenty feet deep.
The room is very cold. Unless the adventurers are wearing protective clothing they will lose hit points at the rate of 1 each two rounds.
The room is not easy to walk across, although Sliding along on the belly would be a possible way to cross the area, as would flying, cracking the ice with an axe, etc. Should a person try to walk across the room, they must walk slowly and roll a saving throw vs paralyzation for every ten feet traversed.
If the saving throw is failed, the person has fallen and must make a second saving throw at -4 or slip into one of the two pits, causing 2d6 damage.