<P> In a 2002 documentary with Kevin Smith, Lee says his brother Larry Lieber made up the name of Thor's hammer referring to the hammer's original name, the "Uru Hammer". Later, writer Roy Thomas changed the name of the hammer to the mythologically correct name of "Mjolnir" and used the name "Uru" created by Larry Lieber as the name of the fictional metal that the hammer is made from . </P> <P> Other significant moments in Marvel continuity include the altering of Mjolnir's enchantments in Thor #282 (April 1979) and Thor #340 (Feb. 1984); the temporary possession of Mjolnir by a member of the Enchanters Three in Thor vol. 3, #14--15 (Aug.--Sep. 1999); and when the hammer has been damaged, occurring in Journey Into Mystery #119 (Aug. 1965); Avengers #215 (Jan. 1982); Thor #388 (Feb. 1988); Thor vol. 2, #11 (May 1999); Thor vol. 2, #80 (Aug. 2004) and Thor vol. 3, #600 (Feb. 2009). </P> <P> In Marvel continuity, Mjolnir is forged by Dwarven blacksmiths, and is composed of the fictional Asgardian metal uru . The side of the hammer carries the inscription "Whosoever holds this hammer, if he be worthy, shall possess the power of Thor ." </P> <P> The hammer is created when Thor's adopted brother Loki cuts off the hair of the goddess Sif as part of a cruel jest, and, when threatened with violence by Thor, promises to fetch replacement hair from the dwarf smiths . Loki commissions the hair from the Sons of Ivaldi and the obliging dwarves also make a magic ship and spear as gifts for the gods . Loki is convinced that no one can match their workmanship, and challenges a dwarf named Eitri to make finer treasures . Eitri creates a golden ring and golden boar spear with magical properties, and finally begins work on a hammer . Loki panics at the sight of the treasures, and, afraid he will lose the wager, transforms himself into a mayfly and stings Eitri's assistant on the brow as he is working the bellows for the forge . The assistant stops for a moment to wipe away the blood, and the bellows fall flat . As a result, the hammer's handle is shorter in length than Eitri had originally intended, meaning that the hammer could only be wielded one - handed . </P>

What does it say on thor's hammer