In reference to Int/Wis, I like to use the rain example. Lets say a character is outside and feels drops of water land on his face. A low intelligence character knows he's getting wet, but doesn't understand why. An average intelligence character knows its raining. A high intelligence character can probably deduce how long the rain will last and how severe it will be based on previous experience and observing the clouds.
Meanwhile, regardless of intelligence, a low wisdom character will stand there and continue to get wet. An average wisdom character will try to cover up or get to shelter. A high wisdom character will...uh...my analogy fails at this point because I'm not a high wisdom character.
In reference to the dungeon layout and guard rotation...
You are two "levels" underground, though each cell's ceiling is high enough to allow a high, barred window adjacent to the execution yard. The cells are situated in two lines with a ten foot corridor between them. The corridor dead ends at the trap door leading to the oubliette. In the other direction is another
arcane lock enhanced door, this one solid stone with a small, barred, window. Beyond that door is a guard station with stairs leading up to the lesser security area of the prison (those prisoners not condemned to death). Opposite the "death row" cells from the guard station is a long corridor leading up into the execution yard.
The guards come in for meal time and to escort prisoners up to the execution yard. Otherwise they are rarely seen. The guards carry
shock-sticks, a
+1 shock club that discharges an
electric jolt effect on command, and has a special adjustment that allows it to deal non-lethal damage. At least four guards are always present during each meal delivery or prisoner escort. A Red Wizard administrator is called in to deal with particularly dangerous prisoners, though the prisoners have overheard the guards talking about how it is unwise to disturb the Red Wizard.
[sblock=For Voda Vosa]Your character knows that there is a hidden entrance to the buried ruins below the city within the oubliette.[/sblock]
[sblock=For Ambrus]Your character has discovered a hidden door in the oubliette, leading further down, though he doesn't know where it leads[/sblock]