It works even if you mill the namesake card, which solves a common problem of build-arounds
It's cheap (mana-wise), it's fast, it lets you get back an instant or sorcery in your graveyard, and it's a 2/1 body that can attack and defend just like any other 2/1 body
Thats neat
Why get a regular foil Blightsteel Colossus when you could get the Double Masters Box Topper variant
Whether Ravensburger severely underestimated the popularity of the game, or the scarcity is an intentional marketing tool, I dont know, but as a new player or someone trying to get into the game, you may not be able to find any product to buy for a while
Since it is countered without entering the battlefield, a finality counter is not placed, so you can cast it from the graveyard as many times as you want