thumb|right|300px|''Groa's Incantation by W. G. Collingwood Grógaldr or The Spell of Gróa is the first of two Old Norse poems, now commonly published under the title Svipdagsmál found in several 17th-century paper manuscripts with Fjölsvinnsmál. In at least three of these manuscripts, the poems are in reverse order and separated by a third eddic poem titled, Hyndluljóð. For a long time, the connection between the two poems was not realized, until in 1854 Svend Grundtvig pointed out a connection between the story told in Gróagaldr and the first part of the medieval Scandinavian ballad of Ungen
thumb|right|300px|''Groa's Incantation by W. G. Collingwood Grógaldr or The Spell of Gróa is the first of two Old Norse poems, now commonly published under the title Svipdagsmál found in several 17th-century paper manuscripts with Fjölsvinnsmál. In at least three of these manuscripts, the poems are in reverse order and separated by a third eddic poem titled, Hyndluljóð. For a long time, the connection between the two poems was not realized, until in 1854 Svend Grundtvig pointed out a connection between the story told in Gróagaldr and the first part of the medieval Scandinavian ballad of Ungen Sveidal/Herr Svedendal/Hertig Silfverdal (TSB A 45, DgF 70, SMB 18, NMB 22). Then in 1856, Sophus Bugge noticed that the last part of the ballad corresponded to Fjölsvinnsmál. Bugge wrote about this connection in Forhandlinger i Videnskabs-Selskabet i Christiania 1860, calling the two poems together Svipdagsmál. Subsequent scholars have accepted this title.
Grógaldr'' is one of six eddic poems involving necromantic practice. It details Svipdagr's raising of his mother Groa, a völva, from the dead. Before her death, she requested him to do so if he ever required her help; the prescience of the völva is illustrated in this respect. The purpose of this necromancy was that she could assist her son in a task set him by his cunning stepmother. Svipdag's mother, Gróa, has been identified as the same völva who chanted a piece of Hrungnir's hone from Thor's head after their duel, as detailed in Snorri Sturluson's Prose Edda. There, Gróa is the wife of Aurvandil, a man Thor rescues from certain death on his way home from Jötunheim. The news of her husband's fate makes Gróa so happy, she forgets the charm, leaving the hone firmly lodged in Thor's forehead.
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