Mjolnir debuted in Marvel Comics title " Journey into Mystery" #83 (Aug. 1962), being the means by which physician Donald Blake transformed into Thunder god Thor Odinson (by striking it on the ground). The first use of the hammer's name was in the "Tales of Asgard" feature in "Thor" #135 (Dec. 1966) in a story by Stan Lee and Jack Kirby. The weapon's origin is eventually revealed in "Thor" Annual #11 (1983), with another version presented in "Thor" vol. 2, #80 (Aug. 2004).