Amphistaff
An amphistaff is the primary anti-personnel living weapon of the Yuuzhan Vong. Amphistaff scales can produce an edge harder than a diamond's that can stop a lightsaber.
In addition to its default staff/spear configuration, an amphistaff can be wielded as a whip or flail by selectively hardening parts of its body.[1] It can also form its edges into blades and be wielded like a long sword, or can be thrown at the enemy. An amphistaff may also project lethal venom at the wielder's prompt. Although amphistaff venom is far more effective when injected, the venom can usually kill the target by coming into contact with their skin.
Supreme Overlord Shimrra's specially bio-engineered amphistaff is known as "The Scepter of Power", and almost killed Luke Skywalker during the events of The Unifying Force, the final book in the New Jedi Order series.
Jacen Solo was able to tame several amphistaffs and make living armor out of them in Traitor.