Shadow Pickaxe Pack is a Bundle.
You can purchase the Shadow Pickaxe Pack from the cash shop for 1,200 V-Bucks. It includes the Shadow Blades, Gold Crow, and Mayhem Scythe pickaxes.
There's also a Double Agent Pack that matches with this bundle!
Shadow Pickaxe Pack's Attachments
Attachments are items that come with a cosmetic when it is obtained.