31P ACID CANAL. This room is made of stone blocks – quite different from the rest of the area – and a canal of clear fizzing liquid runs down the center of the room, between the two exits. The ceiling height is twenty feet.
The canal is composed of deadly acid. Any person who falls or leaps in will die (no saving throw). Putting a limb or other body part in to test the liquid will cause 1d4+1 damage. Adjust this up if more of the body is so exposed. Equipment, including weapons, which are dipped in to the canal must make an appropriate saving throw or be damaged or even destroyed entirely. The acid may be placed in a container and used as a weapon, but it will eat through wood in 1 round, metal in 1 turn, and stone in 6 turns.