Creating Words and Religions for the GODBOUND Role-Playing Game
From the introduction:
There inevitably comes a time when a Godbound player or GM feels the need for some new gifts or new Words. A player might want to develop a particular ability, or a GM might want to trim an antagonist with a new source of primal power, or either might wonder if a particular miraculous effect is appropriate for the game. This section of the book discusses a number of factors and specifics to take into account when building new content of this type.