Plasma Eel
this Yuuzhan Vong grenade was a bioengineered creature whose body was mostly active plasma. The plasma eel resembled an amphistaff in shape, and could be wrapped around a warrior's arm for transport. Then thrown, however, the plasma eel became as rigid as a spear. The plasma inside the eel's body quickly built up energy, and the entire creature exploded upon impact, causing large amounts of damage. After the hostilities between the Yuuzhan Vong and the Galactic Alliance were resolved, and the Yuuzhan Vong were allowed to live on the planet Zonama Sekot, they found that plasma eels and many other bio-engineered weapons simply reverted to their animal forms and fled into the forests. This was one way in which Sekot forced the Yuuzhan Vong to give up their lust for war and embrace a more enlightened existence.