Moments before summoning Fate's Origin.
Rowan's consciousness inside Revah Endirius was barely a fraction of the consciousness power he controlled; it could not be helped.
The shell of Rowan consumed by this Magus might be powerful enough to break her bloodline shackles and bring her to the level of an Old One, granting her talents beyond her wildest dreams, but this shell was made when he was still a mortal and less evolved.
If the present state of Rowan's consciousness was likened to Adamantite, then the consciousness inside the stone shell was less than a soft breeze in comparison, but it still came from him, and that made it incomparably precious.
Rowan could not do much with this weak consciousness power except observe and manipulate Revah's soul when the time called for it, but what was important to him was that he could use this consciousness as a doorway to his primary consciousness.