Skuld ("debt" or "obligation"; sharing etymology with the English "should") is a Norn in Norse mythology. Along with Urðr (Old Norse "fate") and Verðandi (possibly "happening" or "present"), Skuld makes up a trio of Norns that are described as deciding the fates of people. Skuld appears in at least two poems as a Valkyrie.
In the Prose Edda book Gylfaginning, Snorri informs the reader that the youngest Norn, Skuld, is in effect also a valkyrie, taking part in the selection of warriors from the slain:
These are called Valkyrs: them Odin sends to every battle; they determine men's feyness and award victory. Gudr and Róta and the youngest Norn, she who is called Skuld, ride ever to take the slain and decide fights."