Magnanimous maps

.------------------------------|----------------------------.
| Sublevel 1                   |     Sublevel 3             |
|------------------------------|----------------------------|
|      ()=(B)=()=(d)           |   (pit)=()==()==()         |
|      ||                      |     ||          ||         |
|      ||                      |     ||          ()         |
|      ||                      |     ||                     |
|      ()                      | ()==()==()==()  ()==()==() |
|------------------------------|             ||      ||     |
| Sublevel 2                   |             ()==()==()     |
|------------------------------|                 ||         |
|      ()   * - hidden room    |         (u)=()==()==()     |
|      ||       (exit through  |                 ||         |
|      (u)=(@)  the ceiling to |                 ()         |
|          ||   the @)         |                 ||         |
|      (*)=()  ()  ()  ()  ()  |             ()==()==()     |
|          ||  ||  ||  ||  ||  |                 ||         |
|          ()==()==()==()==()  |             ()==()==()     |
|          ||  ||  ||  ||  ||  |                            |
|          ||  ()  ()  ()  ()  |----------------------------|
|          ||                  |     Howlrunner Lair        |
|          ||  ()  ()          |----------------------------|
|          ||  ||  ||          |         ()==()             |
|          ()==()==()          |         ||  ||             |
|          ||                  |        (*)  ()==()         |
|      (d)=()                  |                            |
|______________________________|____________________________|