Voxyn

"Just tell me one thing, Anakin. You're going out there to destroy them, right? Not to study – not to bring back – but to wipe them out." "That's the plan."

- Tahiri Veila and Anakin Solo, going to kill voxyn

Voxyn were savage, aggressive xenomorphs bioengineered by the Yuuzhan Vong to hunt down and kill Jedi. They used genetic information from vornskrs, Force-sensitive predators from Myrkr, mixed with whatever ugly Vong monsters they could find. Voxyn had concentrated acid for blood and could spit acid, had a poisonous barbed tail, and could use Black Canary's "canary cry." (I don't know, maybe the Yuuzhan Vong had Black Canary's DNA stored somewhere.)

After voxyn began killing Jedi, including Alema Rar's sister, Luke Skywalker decided to hunt down and kill the Voxyn Queen. Anakin Solo formed a task force of doomed, inexperienced Jedi to accomplish the task, including Tahiri Veila, Jacen Solo, Jaina Solo, Lowbacca, Alema Rar, Ganner Rhysode, Zekk, Tenel Ka Djo, and all the pretty youngsters. The mission went... er, badly, prompting Zekk to shout "Game over, man!" Oh, and Anakin died.