Pain

Malachi's thoughts ran wild for a while before he was able to calm himself down with deep breaths.

After doing this, Malachi, with the ability now activated to see his anatomy, turned his focus to his chest area.

Malachi's memory wasn't the best but it was better than most people, perhaps because of his profession as a writer, so recalling what he had just seen in David wasn't particularly hard in any way.

Gazing around for a while until he found the pathway entrance of David's marking in his body and making sure it was indeed the one by turning to look at David's anatomy a few times, Malachi took a deep breath, forcefully calmed himself down, and controlled the energy in his body to head there.

Since what he was currently doing was new to Malachi himself, he had no idea how he was going to drill his energy into his pathways.

The first attempt ended up with Malachi brushing the surface of his pathways with his energy.