The Xenomorphs are the primary antagonists of the Alien film franchise. Often considered the most horrifying aliens in fictional history, the Xenomorphs are a minor force in the Non Disney Villains Tournament.
Non Disney Villains Tournament
Xenomorphs first enter the war when Dalek Sec discovers them on a long-lost planet. Sec, along with Meredith Vickers, begins engineering more Xenomorphs in order to produce war on a massive scale. He sends a small troop of them to destroy a Separatist ship, including a Xenomorph Queen. Though the aliens manage to destroy many of the Separatist's droids, the combination of droidekas and General Grievous is able to destroy most of the troop.