Rune Magic is the strongest form of Norse magic. Users of this form of magic can either carve the runes into objects (such as Hearthstone's "runestone" tablets) or chant/sing the names and sounds of the runes (galdr) to cast spells.
In addition to being a phonetic alphabet, each rune has it own name and a variety of esoteric meanings that represent the metaphysical concepts ("the genetic code") of the universe; to cast a spell, the user must understand the meanings of the runes and how they apply to their intended spell. For example, Raidho ("r") literally translates as "Ride" and is associated with travel ("the Journey"), motion, evolution, and rhythms; Hearthstone can use this rune to bend the fabric of space to create an "endless" loop to slow down Gunilla and the Valkyries. Thurisaz ("th") is "Jötunn" and represents the giants, chaotic forces, aggression, destruction, and the thunder god Thor (who is of giant stock); when searching for Andvari's ring, Hearthstone used this rune to temporarily evaporate a river thirty feet deep. Perthro ("p") is "the Unknown" and represents fate, luck, mystery, occult powers, and an emptiness waiting to be filled; Hearthstone once used this rune to place himself and his friends in the hands of fate. Blitzen, on one occasion, used Perthro and a combination of other runes to create a size-shifting carpet bag containing seemingly-limitless space.
To be able to perform it one must go through great suffering: Odin hung from Yggdrasil for nine days with a spear in his side; Hearthstone was resented by his family, who blamed his deafness for causing his brother's death, and was treated as less than a slave. Rune magic is taxing for novices, as Hearth became faint whenever he would use a rune stone in battle.
- The runes used so far are a part of the "Elder Futhark" runic alphabet (named for the phonetic sounds of the first six runes of the first aett: Fehu, Uruz, Thurisaz, Ansuz, Raidho, and Kenaz). This particular alphabet was not used by the Scandinavian peoples (who used the "Younger Futhark") but instead by the earlier Germanic peoples from whom Norse mythology stemmed from.
- Rune magic is more powerful than Alf Seidr.