Harmony of Cordiah
The Merging is what one would call the birth of Cordiah. Legends tell of scattered planes and vast realms floating in the dark for eons. Eventually some great force began to collide these disparate regions into one massive world, Cordiah. It is unknown at this time if anything lived before The Merging.
Many religions in Cordiah like to believe The Merging was the work of their patron. Others believe it was a collaborative effort between all faiths and gods. Others still believe something much more fundamental was the catalyst of the merging. As to what that may be, years of study have given nothing but the smallest and most insignificant of clues.