: A magic system based on six elemental "Urges" (Earth, Fire, Water, Wind, Metal, Wood).
If you are looking for rules or setting "features" for the tabletop game (which shares the name), the "features" refer to its PDQ (Prose Descriptive Qualities) system:
: Damage reduces these Qualities directly, forcing players to narrate how their character is weakened. new Jaws of the Six Serpents supplement launched - RPGnet