The becoming god was a religion created by warforged who did not have a god to call to their own as many of the race believe.
With no claim to a religion of their own besides the Lord of Blades, some warforged have begun a pilgrimage to create their own god by building one.
Devoted warforged from all over scavenge and look for parts to build their supposed god. Most gather in the Mournlands due to the destruction of Cyre, but devoted warforged can be found all over scavenging parts and objects from the world that they believe will help in the creation of their god.
Some warforged in particular gather various holy objects and symbols as well believing the faith associated with such objects will transfer to their god, and help it rise to divinity.