Father and children relationship.

Although Aurelius had failed to capture Blake, part of his plan was to inject his aura into Blake. This way, even if he managed to escape, he would leave a spatial trail that would lead them to the League's hideout.

What he hadn't expected was that Blake wouldn't go straight to the moving base. Instead, Blake went into his pocket dimension that hid his presence and temporarily severed the connection with the spatial trail so far he didn't leave.

"It's a good thing you informed me before returning to the base." Dorian said as he walked out of the spatial corridor Blake had created. He went straight to the mark at Blake's back before placing his hand on it. 

"An operation involving the Emperor, 2 councillors and their high-rank family members. The Synder empire is surely out to get us." Dorian let out a wry smile as he slowly pulled back his hand, extracting a thin icy blue aura from Blake's body. This took care of the tracking as well as the freezing effects.