Amphistaff

Amphistaffs are the primary anti-personnel weapons of the Yuuzhan Vong. They are bioformed, handheld serpents that can attack in a variety of ways. They are, on average, 2-3 meters long and have skins so thick that they cannot be penetrated by a lightsaber unless preweakened (this happened in The Unifying Force). In addition to their default staff/spear configuration, amphistaffs can be wielded as a whip, wrapping around a target then biting it or prompted to spray deadly toxins at its victim.

Supreme Overlord Shimrra wields a specially bio-engineered amphistaff is known as "The Scepter of Power"