Power is everything
Jason was not sure what exactly the being inside his body was, but it seemed to not have lied about his mother having asked for its help to enter Argos.
There was no reason, let alone evidence for Jason to believe the mysterious being, but Jason's memories clearly recalled how sickly his mother had always been.
Furthermore, she had never told him anything about her past, her soulbonds or anything else.
The soul's fraction within him didn't bother Jason much, rather it was helpful as it sealed the Celestia bloodline.
At least, if the being had been true to its words.
Since he had found out about the seals inside his body that were different from the awakening of his bloodline, he had always wondered how it had even been possible for him to be born in the first place.
At the same time, Jason wondered when the first seal had been removed.
'Was the start of everything, when I began to sense mana, or when I gained my eyesight?'