Blood magic was forbidden in the Temple's highest chambers, but Andrew was drawn to it as if by instinct. He would cut his palm and the fire would hiss in pleasure. He could whisper to candles and see them dance. He felt something ancient inside him awaken whenever he bled.
One night, he stole into the private sanctum of the temple and found a black-bound tome chained to an altar. The Codex of Old Flame. Within its pages, he read secrets the priests feared: how to bond blood to fire, how to see through a dragon's eyes, how to call to the bones of Valyria.
Baelor found him reading it. Instead of punishing him, he offered the book freely.
"It has chosen you," the High Flame said. "We cannot stop what's been set in motion."