Darth Atrius joins the other known Sith Lords in the Star Wars canon, Darth Bane, Darth Plagueius, Darth Sidious, Darth Maul, Darth Tyranus and Darth Vader.
Marvel Comics recently released their Star Wars Annual #4, which confirms a brand new Sith Lord that can be added to the Star Wars canon, named Darth Atrius.
With all of that being said, Darth Atrius’ inclusion in this comic could lead to more stories about his past, although Atrius’ exact placing within the Star Wars timeline remains uncertain.
Star Wars Annual #4 follows a smuggler named Sana Starros, who has tracked down the ancient weapons of Darth Atrius, a pair of crossguard lightsabers, similar to the controversial design used by Kylo Ren that was introduced in Star Wars: The Force Awakens.