From the introduction:
This is the main rule of this game. Numero uno. Every session starts with everybody shouting "¡Mientras tanto, los MAGOOOOS DEL TIEMPOOOO!" or "Meanwhile, the TIIIIME WIZAAAAARDS!" or something else, depending on your preferred language.
Time Wizards Barebones System, sometimes called the Time Wizards Outline, was published in November 2012. It is the first published rule set of the game, derived by interested readers from various forum posts of the author.