Luck Tokens are a metacurrency to alter events in the story. Every session you begin with a number of Luck Tokens equal to your base Level. These can be spent for several things:

Characters get one Token at the start of every scene if they have room, but can’t have more than their Level. GMs can also award Tokens for good roleplay, entertaining comments, helpful record keeping, or anything else they feel is worthy.

The GM starts the session with a number of Tokens equal to the number of players, or as many as the highest Level PC (whichever is more) and also gets one Token per scene. He may use them on behalf of the opposition on any test.