Luck

Luck is the supernatural ability to have either really good or really bad things happen to you. Your level 3 character comes across a Great Wyrm Prismatic Dragon? Well, if you are lucky enough, that Dragon might have a single health point. If you are unlucky, it might have a family. It also determines the amount of re-rolls a character gets, which Chart of Random Fun Things a character rolls on, save for creation, and other things, such as flirting to get closer to someone with good information or status, or gambling your way to great wealth (or great poverty).