Tomb, Seven Havens:
1 check / 200' of hallway or tunnel: Roll 1-D20 -- Roll needed for encounter: 11+
1 check / chamber or room: Roll 1-D20 -- Roll needed for encounter: 3+
%Roll: Encounter types:
01-05: Character G.M.: Pre-make all NPC character encounters.
06-20: Dead
21-22: Jahtha
23-27: Jahthein
28-29: Race
30-00: Undead