Ren alongside Tanith arrived in the world were Christoph was born. The gravity in this world was lighter than in any other place Ren had been in which surprised him momentarily, but after a second he quickly adjusted to the gravity.
Ren then spread out his mana covering the entire world at this stage with his current power this was a simple thing to do. At this very moment, Ren could sense every single living being in this world. If it were him during his demon lord phase, this much information would have made him crazy but with his current abilities doing something like this really wasn't much of a problem.
"I found him."
The very second Ren detected Fyodor's presence he tore open the space in front of him and entered the crack in space Tanith followed close behind him.
...