Flowers in the Garden of Bones
We uses dice to guide how events turn out in the story. Dice come into play in two ways: Contests and Tests.
A Contest is started when a character wants to make another character act. It could be plying him with honeyed words, hoping that he will help you out; it could be punching him in the face, hoping that he will fall to the floor. Whenever your character does something and you want to put dice behind it to make your action significant, you’re starting a Contest.
A Test is initiated when you’re trying to do something risky, dangerous, exciting, or uncertain. Storyteller calls these. You might be going right along, talking about how you leap from building to building chasing after the mugger, when Watchtower interrupts you saying, “How about you roll some dice for that, big shot?” Then it’s a Test.