There was a rumor in the Senate chamber that Darth Maul was hiding in a remote system.
The Jedi, who were busy commanding the Republican forces in the war, decided to unofficially deal with Darth Maul.
To this, Obi Wan volunteered.
Darth Maul was working with Savage Opress. Savage didn't want to admit it, but Darth Maul considered Savage to be his apprentice. He still deserved the title of Darth, as a Sith, but he did not give his apprentice Savage the title of Darth. The only cause for action was to kill Obi Wan.
The two men first bribe the pirate with short-term credit. But there was no real loyalty.
When Obi Wan comes, the pirates turn and end up drifting through space in an escape pod.
The pirates believed they were both dead, but they knew Obi Wan would not be easy to defeat. He didn't even die on Naboo.
Obi Wan reports to Yoda and Palpatine. Obi Wan warns them that Maul's growing power is a threat, but Palpatine counters that he is no more of a threat than Dooku is.
Sidious is delighted to learn that his former apprentice is still alive. At the assembly, the Sith can prove that there are two of them, because they can prove what they said. As Maul and Dooku except for Sidious.
Another expectation for Maul is the elimination of Obi Wan. Obi Wan was a hindrance in making Anakin his new apprentice. Getting rid of Obi Wan would greatly advance the plans of the Sith.
So Maul's use was well worth it.
Maul and Savage are accidentally captured by the Deathwatch pre-wizla.
They unite in that their common enemy is Obi Wan Kenobi. Maul is complicit in Prewizla's capture of Mandalore. They contact a number of organizations to gather the supplies, ammunition, and troops needed for it.
These include the Black Sun, Pike, and the Hutts. Even for such a ragtag group, the scenario written by Maul was effective. Rather than the Deathwatch attacking Mandalore by force, the armed group led by Maul would first bring Mandalore under attack, and then the Deathwatch would release the captured citizens, transferring power from Duke Satine to Prewizla. This idea was effective in deceiving Maul because he saw that Prewizla would betray him after the plan was over. Since Maul would not be out in the open, it would not attract the attention of the Jedi.
The plan was easy, partly because of the careful preparation. All that was left was to use Duke Satine as bait to get rid of Obi Wan. However, Prewizla assumes that he will be the one to kill Obi Wan and imprisons Maul and Savage, who are no longer needed. Prewizla is satisfied, but tells Savage that Maul has not really won the support of the public. A relieved Wizzla replaces the puppet as the ruler of Mandalore. He will use the imprisoned Prime Minister Almek, who was imprisoned there, as a frame.
In keeping with warrior tradition, he challenges Wizla to a one-on-one duel. If Wizla is defeated, the Deathwatch will be divided. This will put Chancellor Almek in control in the front and Maul in control in the back. Then he takes care of Duke Satine in front of Obi Wan, who comes alone. After exacting his long overdue vengeance, he attempts to expand his influence to other neutral systems.
Sidious senses this, and goes to Mandalore late at night on Coruscant, alone.
Sidious praises Maul for surviving, but takes care of Savage in a two-fisted fashion, citing that he no longer needs Darth Maul. He was angry that he did not kill Obi Wan. And he makes them understand the teachings of the Sith, the Rule of Two.
The Jedi consult with the Supreme Chancellor to find out what the Sith really are. So Palpatine makes the matter of the Sith public in Congress, in order to bring the war to a quicker conclusion. With the cooperation of all the senators, he decides to expose the Sith. If you want to know who it is, we can do something about it.
This was inconvenient for the Jedi. If the Sith were in control of the Senate, they wanted to secretly look into it, but it was brought to the surface by Palpatine and stuck in the investigation. It was explained to the council that Sidious, sensing the Jedi's movements, had gone into hiding.
After that, no trace of the Sith could be found, but it was inconvenient for the chancellor to be suspicious without any Sith other than Dooku. Then Darth Maul suddenly appears.
The explanation that the other Sith was Maul arrived, and Sidious, who wanted to hide himself, was pleased. Sidious, who wanted to stay out of sight, was pleased. 'Let's bring this matter to a close. Translated with www.DeepL.com/Translator (free version)