Coruscant

From Expansion of the Force: Star Wars RPG Wiki

Coruscant's darkest hour was at the peak of the Yuuzhan Vong War. During the Fall of Coruscant, the extragalactic Yuuzhan Vong overwhelmed the Republic defenses in three attack waves and conquered the planet. Coruscant, which had been completely covered in city sprawl for millennia, was devastated during the assault.

The planet's underbelly has become overrun with giant spider-like creatures, as well as Voxyns. They were developed from vornskr stock from the planet Myrkr and that of the fero xyn which was native to the Yuuzhan Vong galaxy.