“And Harry also knew that it was Thestral blood which painted the symbol of the Deathly Hallows on the inside of the Cloak, binding into the Cloak that portion of Death’s power, enabling the Cloak to confront the Dementors on their own level and block them.”
Thestral blood, forcibly taken, plus Hermione’s flesh, willingly given, plus bones of Harry’s ancestors, unknowingly bequeathed, mix together to form a Harry resurrection potion.
I’ll add Thestral blood
Thestral blood, forcibly taken, plus Hermione’s flesh, willingly given, plus bones of Harry’s ancestors, unknowingly bequeathed, mix together to form a Harry resurrection potion.