Behemoth Scavenging

In the far future, on a parallel-universe planet that similar to Earth, there is a kind of sacred creature called the Behemoth. No one know where they are coming from. They only know that the Behemoth would fall from the sky whenever a person in the tribe passed away. The human start to form a spiritual worship toward this creature and the whole village thrives upon the scavenging from the body of Behemoth.