Ygziir, a planet situated within the Yuuzhan Vong galaxy, served as the base for a domain that was an ally of Warmaster Steng, and it might have even been his personal seat of power. This world, along with its accompanying moon, met its end during the Cremlevian War when it was destroyed.
The domain commanded by the opposing Warmaster Yo'gand employed a massive dovin basal to forcibly draw the moon into a collision course with the planet; this strategy would subsequently be referred to as the Yo'gand's Core maneuver. Steng's domain either capitulated or was completely annihilated. Given the established procedures of the Yuuzhan Vong, the probability leans towards the latter outcome.