Cheapest priced copy (Marvel Super Heroes): $21.99 at Card Kingdom, near mint, their price list as of .
Mjölnir, Hammer of Thor 
Legendary Artifact — Equipment · Mythic · Marvel Super Heroes · #303
When Mjölnir enters, it deals 4 damage to up to one target creature.
Double all damage equipped creature would deal.
Equip worthy {1} (A creature is worthy if it's a legendary non-Villain that's red and/or white.)
{2}{R}, Discard this card: It deals 2 damage to each creature.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $21.99 to $54.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Marvel Super Heroes | 146 | Mythic | $21.99 | $22.99 |
| Marvel Super Heroes | 303 | Mythic | $27.99 | $32.99 |
| Marvel Super Heroes | 339 | Mythic | $34.99 | $54.99 |