Sindri Myr is a major antagonist of the first game in the Warhammer 40,000:Dawn of War series.He's a chaos sorcerer who came to planet Tartarus to aid the chaos lord Bale in his campaign.

Sindri used his powers to convert the Blood Raven's librarian Isador Akios to Chaos. the Chaos Space Marines under Sindri's command defeated many foes among space marines, imperial guardsmen and orks, and Sindri eventually betrayed Bale in order to get enough blood for the god Khorne.

Sindri used the Maledictum artifact to turn himsel into a Daemon Prince, but he was subsequently vanquished by the Blood Ravens, causing the release of the greater daemon Bloodthirster.