Vonduun Crab
this crustacean was native to the homeworld of the Yuuzhan Vong, where it was the only known predator of the amphistaff. This was due to the fact that the vonduun crab's shell was the only known substance that could repel an amphistaff's teeth as well as it narrowed blade form. Because of this, armor-like shell was bio-engineered to exist away from the crab's body, where it could be used by the warriors to make living, protective armor known as skerr kyrric. The armor was essentially a bioengineered crab, complete with gripping legs that held the armor to the warrior's body in several places. The armored shell was composed of an intricately structured crystalline lattice, and was reinforced by and energy field created by power glands not unlike those of the amphistaff. By chance, Corran Horn discovered that the vonduun crab was allergic to the pollen of the bafforr tree. The crab armor would swell up in reaction to the pollen, quickly suffocating the warrior wearing it. The Yuuzhan Vong soon discovered this, and wiped out the planet Ithor in hopes of eliminating the threat. However, the shell armor could also be pierced at a depression beneath the armpit of the wearer. A strike to this point by blaster bolt of lightsaber could kill both the armor and the warrior wearing it.