"It can't be repetitive. You can do specialist momentum instead of sorcerer momentum, if you want, and just be a healer or an architect or something, and then you can take a whole weekend off if you want, but for sorcery you need variety. And it's harder to do things that people wouldn't want you to do, because they all have their own bit of momentum even if it isn't very much. And you need bigger and bigger projects. It is pretty easy to do all of the things in your momentum class that there are to do in a town in a week or three and then you have to go somewhere else, because you can't just wait for more stuff to crop up."