There is no ruby dust or emerald dust to be found on level 12. The wide, symmetrical-arranged rooms look to have been built recently.
This level is the base of the Army of General Afschrlyyjlvrmllo.
Whenever you feel the time is right, roll 2d6.
| 2d6 | Monster |
| 2 | Semivampires |
| 3 | Supergargoyles |
| 4 | Shadows |
| 5 | Gargoyles (+ Supergargoyle) |
| 6 | Wraiths |
| 7 | Soldiers |
| 8 | Soldiers |
| 9 | Trolls |
| 10 | Hill Giant |
| 11 | Stone Giant |
| 12 | Medusa |
Wandering monsters are there to annoy, not to kill the entire party (that's what the resident monsters are for). Choose the numbers accordingly.
Remember also to include as many oozes, slimes, gelatinous cubes and other gooey things as you like, as well as enough carrion crawlers and other clean-up monsters to make sure that anything left lying around is not left lying around for too long. Keep your dungeon tidy!