“He does have other avenues to life, should he perceive this one blocked,” Snape said dryly, uncapping a fourth bottle. “And before you ask, it must be the original grave, the place of first burial, the bone removed during the ritual and not before.
I think all the sacrifices, including the blood of the enemy, must be made during the ritual.
This again.
I think all the sacrifices, including the blood of the enemy, must be made during the ritual.
That is supposition. Reasonable supposition, but supposition nonetheless.
It’s worth noting that this quote also occurs in the same chapter.