Your attacks can shatter objects. You strike at weak points in your opponent's armor or hide, reducing their armor class by 4 for a short period of time. This attack also makes the target easier to strike with grazing hits, reducing the required d20 roll by 2. A successful Fortitude save negates this effect. (DC 10 + Half Monk Level + Wisdom mod + Sunder modifiers) The target receives periodic saves to attempt to break free of this effect.