Painfully

You go to the basement, and following her instructions strip naked. You even empty everything out from your inventory, and boy, was she surprised at the tomes you had!

You had ordered the others to keep watch.

Seeing them she frowned. “I would have driven a harder bargain if I knew ye had these!”

“And that be why we didn’t tell ya!”

You stand in the middle of a diagram, and she prepares the Holly by getting the Fighter, and making him bleed into a bowl containing other things, included the burnt holy text. She painted the Holly with this substance and let it dry in a tray for a few minutes.

Then she gathered it, and had the fighter bleed on the diagram as she chanted, calling on the Gods to let you gain the powers of thy ancestors, and all their affinities, but not the weaknesses. To let you earn it so the power will truly be yours.

As she chanted you felt the darkness of the room seep into you and examine you, both your blood, but your mind and deeps. No matter how bad things were, you never truly gave up! Sometimes you seemed to, but that was because you were trying to figure a way out, or was planning something.

Seeing this, you felt it approve of you.

Eventually the darkness retreated and you felt different, like potential which had been sealed away could now be reached, and you knew it was because it was true!