Tungsten carbide is a hard, strong material used in really long-lasting tools.
This deck is a decent silver farmer. It doesn't get 8 TTW like PitchBlack Hole, but if Silver starts adapting with BH's and you don't have lots of rares, you know what to do.
The idea of this deck is like PitchBlack Hole's: Drive a road straight to the enemy with denial, and rush your creatures through it. You could mod this deck with diamond shields and the like to make it better for bronze and HB.
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I have yet to check its actual winrate, but it's something like 85%. That's just my feeling though, it might be wrong.