Read the record.

We needed a vessel that could fully contain
and imprison the dark power taken from Elion.
A vessel that could banish the darkness with pure, overwhelming power,
and even contain the darkness and self-destruct with it...!
At first, I tried to do that myself.
The problem was, if I failed, there'd be no backup.
I needed someone with pure and great Sacred Power
who could either become the vessel or stop me, should I fail.