Stab-O-Matic Soda makes you knife one knife kill any round, and costs 3000 points
Stab-O-Matic is a custom perk that appears in some non-canon maps. It is dark nlue in color and costs 3000 points. The perk makes you able to one-knife kill zombies on any round. This perk is not as good as it sound though, because Many players go down while knifing, and it is relatively hard to knife when being chased by large crowds of zombies.