Editing Veins of the Earth (section)

==Light and Dark==
In a place of total darkness, light is everything.  It provides a lot of additional rules for cave adventuring long-term, including simplified exchange rates (1 sp = one hour of light = 1 lume) for lantern fuel of various kinds, advice for how to run and describe adventuring in dark places, rules for handling darkvision/infravision (here's what it can actually do and help with, here's what it ''can't''), initiative rules based on who has light sources (blind creatures don't need light to function, but sight has some advantages so they ''always'' go after sighted targets with light sources in combat), and lots of neat ideas for cool light sources that call to mind an adventuring party whose lamps are as diverse as their races and classes.

Also has rules for what to do when things go ''totally'' to shit and the party has to make its way in total (not ''near'' total, total) darkness.  They are harsh and unforgiving, though not unsurvivable. In what will be the start of a trend, [[Constitution]] suddenly becomes the most important stat in the game, because someone needs to save vs. every ability score, and if Constitution blows then all fails are cumulative instead of the first bad result happening.