Durk's Secret dungeon has what looks like a sealed wall with no levers or runes, but the map shows there is something behind it. It also has two doors with runes. One I was able to open, another said "You are not intelligent enough to use this rune."
How do I open the "blank wall"? (Do a Search for secret doors?) If I bring a wizard henchman -- hopefully with higher INT than mine, -- will he use the more difficult rune?