Wrecker
From Legends of Cphera
Plate armor (Breastplate, Half Plate, Full Plate, and Enforced Full Plate), while exceptionally tough, is susceptible to certain weapon designs. A weapon that is described as a wrecker treats the armor as if it had a much lower hardness than usual.
Wreckers that would normally deal slashing damage are considered to deal bludgeoning damage instead when dealing with these four armors.
Weapons may also be described as a Half Wrecker. If a half wrecker deals damage to an armor with a wrecker hardness of 4, it treats that hardness as twice as high, 8. Therefore it is still better than a normal weapon but not as good as a proper wrecker.