It is beneficial to purchase this item if it is planned to be upgraded later in the game.
This item will pay for itself after 26 minutes, or if sold, in 13 minutes.
This is the only gold generating item that retains its gold generating passive when it is upgraded. This only applies if it is upgraded into Shard of True Ice.
The name "Kage's Lucky Pick" is potentially a reference to the person of Kyle Gass, particularly in the film "Tenacious D and the Pick of Destiny", in which he is referred to as "Kage" throughout and seeks the titular Pick.
The passive "Lucky Shadow" refers to the rōmaji for shadow in Japanese, kage; whether or not this precedes the V126.96.36.199 patch is uncertain.