The Negev | Mjölnir skin was added to CS:GO on June 4, 2020 as part of the Norse Collection update.
This skin features a light gray body with intricate Norse knotwork patterns in black and red. The top of the gun has a metallic hammer design based on Thor's hammer Mjölnir from Norse mythology.
The Mjölnir skin is one of the more popular skins for the Negev due to its connection to Norse mythology. As a classified skin, it has seen a decent amount of demand on the Steam marketplace.