The game is a continuation of a series of first-person shooters, originating as a modification of Half-Life. The Shadow Daggers are the most expensive skins in the game. Exchange your Soul Gems for this item and become the best! ★ Shadow Daggers | Blue Steel. This skin will change the appearance of your knives. To get a skin it is necessary to exchange Soul Gems, which you can earn by participating in events and opening containers. You can get a maximum of three skins of the same quality (except for StatTrak™). The Shadow Daggers are a deadly weapon in the right hands. This skin will allow you to stand out among other players. The skin has an elegant blue pattern. Exchange your Soul Gems for the Shadow Daggers | Blue Steel!