There's a bunch of em!
- House Cannith. Mark of Making (Human). Smithing, Constructs, Inventions.
- House Deneith. Mark of Sentinel (Human). Mercenaries and Bodyguards/Security.
- House Ghallanda. Mark of Hospitality (Halfling). Restaurants, Inns.
- House Jorasco. Mark of Healing (Halfling). Healthcare.
- House Kundarak. Mark of Warding (Dwarf). Security. They run Banks and Prisons, as well as private security services.
- House Lyrandar. Mark of Storms (Half-Elf). They run ocean and air travel, as well as weather manipulation.
- House Medani. Mark of Detection (Half-Elf). Inquisitives, Private Detectives, Bodyguards.
- House Orien. Mark of Passage (Human). Overland travel, including the Lightning Rail and teleportation.
- House Phiarlan. Mark of Shadows (Elf). Entertainment and Theater.
- House Sivis. Mark of Scribing (Gnome). Communication, record keeping, translation, lawyers.
- House Tharashk. Mark of Finding (Half-Orc). Bounty hunting and Prospecting.
- House Thuranni. Mark of Shadows (Elf). Entertainment and Theater (used to be part of Phiarlan).
- House Vadalis. Mark of Handling (Human). Animal Husbandry.