Mjolnir

Mjolnir, known more formally as Mjölnir (/ˈmjɔːlnɪər/) is a fictional magical weapon appearing in American comic books published by Marvel Comics. It is depicted as the principal weapon of the superhero Thor. Mjolnir, which first appears in Journey into Mystery #83 (Aug. 1962), was created by writer Stan Lee and designed by artists Jack Kirby and Joe Sinnott.

Mjolnir is typically depicted as a large, square-headed gray sledgehammer, with a short, round handle wrapped in brown leather, culminating in a looped lanyard. The object is based on Mjölnir, the weapon of the mythological Thor.

Canon
Other than Thor and Odin, certain other individuals have proven worthy of lifting Mjolnir in the primary continuity:


 * Roger "Red" Norvell (a deliberate ruse by Odin)
 * Beta Ray Bill
 * Buri (also known as Tiwaz, Thor's great-grandfather)
 * Captain America in his "The Captain" role
 * Eric Masterson
 * Bor (Thor's grandfather)
 * Loki
 * Jane Foster
 * The Destroyer
 * Squirrel Girl
 * Black Panther (of Avengers 1,000,000 B.C.)
 * Eddie Brock (with help from the Enigma Force)
 * Vision (of the Marvel Cinematic Universe)

Alternate versions of the Silver Surfer, Conan, Black Widow, and Valkyrie have lifted Mjolnir through worthiness. Other Marvel characters have lifted Mjolnir not through worthiness but through technicalities such as absorbing Thor's powers, including the Air-Walker, Awesome Android, Magneto, Rogue, Wonder Man, and Doctor Doom.

Moon Knight also has the ability to lift Mjolnir as it is made from Uru, a metal ore from the moon of a dead universe. So, with the help of Khonshu's influence, Moon Knight has the ability to control the hammer.

Two DC Comics characters have lifted Mjolnir in Marvel/DC crossover events:
 * Wonder Woman
 * Superman

Several imitations of Mjolnir have also existed:
 * Odin gifts the hammer Stormbreaker to Beta Ray Bill
 * Odin gifts the mace Thunderstrike to Thunderstrike
 * Loki creates the hammer Stormcaster for Storm in an attempt to control her, but she uses Mjolnir to destroy it
 * Loki provides another version to Deadpool to spite Thor
 * Loki also allows Surtur to use the forge Mjolnir was created from to craft copies during Ragnarok
 * HYDRA creates an evil version of Thor wielding a technological imitation of Mjolnir
 * Tony Stark and Reed Richards create an imitation Mjolnir for their clone Ragnarok
 * The frog Throg discovers a sliver of Mjolnir that transforms into the hammer Frogjolnir

Fanon

 * Peter Parker (Marvel's What If...?: The Video Game)