This is an Indigenous North American oral narrative, almost certainly from the Iroquois (likely Seneca) tradition, as indicated by its named characters—Donongáes (the Horned Snake) and Híno' (Thunder)—who are figures from Haudenosaunee cosmology. The story follows a young woman who rejects human suitors and unknowingly marries the youngest of seven horned serpents, only to discover his true nature when he enters their home as a great snake each night. Aided by an old man revealed to be Thunder, she steals the bundled hearts of the seven snake brothers—their collective vulnerability—and flees, enabling Thunder to kill the Snake and end a long-standing cosmic enmity. The woman then lives among the Thunders for roughly a year, during which her own power grows to the point where she can kill a monstrous bloodsucker that the Thunder men themselves could not defeat. What is most distinctive is the woman's role as an active agent whose cooperation is indispensable to the Thunder beings: she is not merely rescued but becomes a necessary partner in cosmic warfare, her human power complementing theirs. The story closes on an ambiguous note—her power is so great upon returning home that a single blow splits a mortar, suggesting the ordeal has permanently altered her nature.