Brandon Sanderson
Chapter Twelve
Lightsong Hears Petitions
The concept of petitions—and the gods being able to heal someone one time—grew out of my desire to have something about them that was miraculous. Something obvious, something more than just an ability to make vague prophecies. Their Breath auras are amazing, true, but an Awakener with a lot of Breath can replicate that.
I took the idea of being able to die in order to heal from an idea discarded from Elantris. If you look at the deleted scenes (Caution: Spoilers for the ending of Elantris), you can read about how there was originally a subplot to the story where the Seons (the floating balls of light) could expend the Aon at their center and create a miraculous event one time. However, doing so would kill them. I eventually ended up not using this plot structure in the final draft, and so I cut all references to this ability from the book. I felt that it was too contrived in that novel.
I've always thought it was interesting conceptually, however, so I developed it into this book as an aspect of Returned that makes them different. They can create one miracle—and in this world, that one miracle has to be a healing. They can expend their divine Breath to heal someone.
This created another problem for readers, however. It became very difficult in the book to explain to them that a Returned could still Awaken things—but not by using the Breath granted to them by their Return. In other words, if a Returned gained a hundred extra Breaths, they could use them just like anyone else's. But if they give away the Breath they start with, it kills them.
Every person starts with a Breath. Well, Returned start with one too—a divine Breath that can be given away to heal someone else's Breath that is weakening and dying. That's what these petitioners are asking for.
But regular Breaths, they can give those away. They just have to be tricky about it.