The Shadow Collective was an alliance of underworld organizations assembled by Darth Maul using a mix of persuasion and brute force. Maul struck a deal with Death Watch leader Pre Vizsla and won the support of the Pyke Syndicate, then subjugated Black Sun and the Hutt Clan by force of arms. The Collective took over Mandalore, but its heyday was short-lived, and it fragmented after Maul’s defeat by Darth Sidious.
The warrior clans of Mandalore were believed to have been wiped out ages ago, their tattered remnants exiled to the Concordia moon. But as the Clone Wars swept the galaxy, the treacherous governor Pre Vizsla resurrected the Mandalorians, and with them, their legendary combat armor that was feared across the galaxy. Backed by Count Dooku and the Separatists, Vizsla began building an army to retake Mandalore from the control of pacifists who were trying to bury violent Mandalore's past. As the coup became inopportune, Dooku abandoned the Death Watch. The warriors wandered the galaxy for a time, then helped conquer Mandalore as part of Darth Maul’s Shadow Collective. Maul then became Death Watch’s leader when he killed Pre Vizsla
During the Clone Wars, Pre Vizsla served as governor of Concordia, a moon of Mandalore, and appeared to be a close ally of Duchess Satine Kryze. But Vizsla had another, secret life: he was the leader of Death Watch, a hidden group of Mandalorian commandos seeking control of their planet. In truth, Vizsla despised Satine’s pacifist beliefs and longed to restore Mandalore’s warrior heritage. To accomplish this goal, he formed several alliances with nefarious parties that ultimately led to his end.
A deadly, agile Sith Lord trained by the evil Darth Sidious, Darth Maul was a formidable warrior and scheming mastermind. He wielded an intimidating double-bladed lightsaber and fought with a menacing ferocity. Though he fell in battle against Obi-Wan Kenobi, the Zabrak from Dathomir would prove to be much harder to destroy than originally believed.
Savage Opress was once a common Nightbrother whose fighting prowess impressed Asajj Ventress. Transformed into a monstrous warrior by Mother Talzin, Opress became Count Dooku's new assassin and secret Sith apprentice. His loyalty, however, remained to Talzin. The Nightsisters leader gave Savage a new quest: to find his brother, Darth Maul, who had somehow survived his apparent death and was living in exile in the Outer Rim. Savage located Maul and became his brother’s enforcer in the Shadow Collective, but died when Darth Sidious confronted the two Sith warriors on Mandalore.