When you Cast this Spell, roll 1d20 and make a note of the result. You gain the That's My Number reaction; once you use the reaction, the spell ends, and you become temporarily immune to lucky number until the next time you make your daily preparations.
Spell Effect: Lucky Number
Traits
An action with this trait requires a degree of mental concentration and discipline.
Spells with this trait grant you an action during the spell's effects, typically a reaction with a special trigger. They typically have a long duration, such as 24 hours. You can have only one spell with the contingency trait, or one contingency spell, active at a time. If you cast another spell with the contingency trait or contingency, the newer casting supersedes the older.
You must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.