One more before I post the update to Megacrawl 3000 ...
Although removal of the sapphires is very tempting, it is a dangerous thing to do. If a sapphire is plucked from the wall of the cave, a blue ray erupts from the wall and strikes the person holding the sapphire (no roll needed). The ray always strikes the person in the forehead and sets up a communication between the thief and something from beyond the void (per the contact other plane spell). The experience leaves most people a bit jumbled (1d8 points of ability damage spread between intelligene, wisdom and charisma as the player prefers). This damage can be healed with magic (restoration), but will not heal naturally.
If all of the sapphires are stolen from the cave, the rays create a portal through which 1d6+4 star warriors emerge. The star warriors are hairless humanoids with translucent, sapphire skin and eyes and wearing long, metallic coats of miniature scales (the material is aluminum - light weight and quite strong) and carrying two war hammers each. The star warriors track down the sapphire thieves and return them (the sapphires) to the cave. The thieves are either killed or they are taken back to the cave and taken through the portal.
| Hitotsumi-Kozo: HD 3; AC 6 ; Atk 1 weapon (1d4); Move 9; Save 14; CL/XP 7/600; Special: Bad luck, frightful appearance, ray of enfeeblement, silence, true seeing.
| Star Warrior: HD 5; AC 1 ; Atk 2 hammers (1d6); Move 12; Save 12; CL/XP 5/240; Special: Track sapphires unerringly, immunity to cold, ESP at will.
Also - to avoid confusion when talking about the Cloud Dragon, Gold Dragon etc kingdoms and the monsters of the same names, I've given the kingdoms alternate names:
Jin - Gold Dragon Kingdom
Meng - Mist Dragon Kingdom
Ying - Shadow Dragon Kingdom
Yun - Cloud Dragon Kingdom
Of the kingdoms, Meng no longer exists (at least, not in a normal way), its citizens now serving as the empire's merchant class based in the coastal cities.