A character may become Lucky.
You can track this with a green poker chip or via the checkbox on the Character Sheet.
NPCs can be Lucky as well, and usually are if they come prepared.
Luck is awarded at the GM's discretion for:
Awarding Luck to an already Lucky character immediately burns it. (The character stays Lucky.)
When Luck is awarded for group activities, or for minor challenges, the GM may decide to have each participating character roll the dice to decide if he gains Luck.
Conversely, for particularly great deeds, Luck may be awarded multiple times over (thereby burning some of it).
Luck can be spent at the player's discretion at any time.
He may choose to:
Each time a character burns Luck, roll a d6. On a 6, he gains 1 XP.
Luck is burned immediately:
Although Luck must be burnt at the end of each adventure (Downtime), characters may keep it in-between playing sessions covering the same adventure.