He had appeared at this particular point in time because it was as far as the Rewind Metac could bring Fenrir and the Divine Position. Any further beyond this point required too much energy for the Rewind Metac to continue moving.
So he was sitting down, relishing the changes and improvements that a Cave Heaven has provided to him, when Fenrir came running from the future with a Divine Position in its stomach.
A Divine Position was created using the heart of a world as the ingredient, but a Divine Position is not the heart of a world. The two of them are not the same thing, but he has had a lot of experience fusing with the heart of a world.
Besides, this fusion isn't to create a Cave Heaven for him. He already has a Cave Heaven, so the fusion this time was faster than before.
