Denver was the one who had the easiest in this whole separation. Not only does he have the Geomancy, which was perfect for the catacombs, but he also has Elise with him, who also has Geomancy, technically.
Normally, Geomancy wouldn't have been much of use since the walls and ceiling were practically unbreakable. However, this time, he knew that there was a weak point he could use.
The middle-aged man had just covered the up weak point with even more stones and soil, making it even harder than before. Geomancy was slightly different for some people. It could attach to the ground and not disappear like other elements.
This happens when the ability leans towards the creation aspect instead of the control aspect. The middle-aged man Geomancy leaned towards the former while Denver's towards the latter.
