The sheer force that Mordant could bring with dark mana and entirely captured the attention of the grand witch of decay. Since she also had a representative from her coven, she had made them walk along with him and herself to speak and learn. This was also to help bring the dark mana together a little better in to one place.
There had been some resistance after Mordant and Onyx had arrived to traveling by air to get to Genesis faster. To be honest, though, Walker was liking it a bit better. The soldiers who were walking on the edges and moving with them were showing their strength as they dealt with a few small monsters or scouted the surroundings.
This was a chance to build some additional trust so that the witch born race members would feel safer with their own protection details when they arrived. They could see the strength and accept them without worrying for their safety constantly.