Grutchin Symbiote
this variation on the Yuuzhan Vong's living weapon, the grutchin, was developed for use in ground-based personal combat. Any Yuuzhan Vong warrior choosing to fight with a grutchin symbiote was required to have four holes bored into the flesh of their backs, into which the legs of the symbiote were inserted. A pair of front limbs acted as arms, and wrapped around the warrior's neck, and the head of the symbiote sat on the warrior's shoulder. If the sight of a two-headed warrior didn't force an opponent to back down, the symbiote could be directed to leap from the warrior's back and attack the opponent. The grutchin symbiote fought until it killed its victim or was called back by its owner. The warrior directed its symbiote with a form of telepathic communication, implanting a picture of the enemy into the grutchin's mind.