Novice Lightning Rune is a weapon rune in Dragon Age: Origins.
Acquisition
Dragon Age: Origins
Sold by Bodahn Feddic in the Party Camp for 90 0.
Dragon Age: Origins - Awakening
Ambassador Cera sells unlimited quantities of this rune in the throne room of Vigil's Keep for 66 0.
Witch Hunt
Sandal sells unlimited quantities of this rune in the Apprentice Quarters of the Circle Tower in Witch Hunt DLC for 69 0.