A Tributary of Tales was originally published as the first story in the Revenge of Rondhol campaign and was written by Keza. You can find the original story here. 

The Great Weave is a shared, living world, within the Age of Sigmar universe. With collaborative world-building and game creation tools, in addition to an amazing community of narrative players from across the world, the Weave has been created out of love for those that want a richer experience within this wonderful world of magic, heroes, and monsters. Welcome home.