For 10 points, name these organs through which a stake must be pushed to kill a vampire.
Huitzilopochtli threw one of these objects belonging to Copil into Lake Texcoco. People were buried squatting and carrying a jade bead, which represented them, in the seventh trial on the journey to Mictlan. When people questioned Hanuman's reverence for Rama and Sita, he showed them that they resided in this object of his. Birds warned Sigurd of Regin's arrival after the former ate the one belonging to Fafnir. Ammit devoured the ones heavier than the feather of Ma'at. As a sacrifice to the sun gods, Aztec priests extracted these objects from living victims. For 10 points, name these organs through which a stake must be pushed to kill a vampire.
Huitzilopochtli threw one of these objects belonging to Copil into Lake Texcoco.
hearts