As implied by his name, General Immortus is an ancient military commander who is knowledgeable in every combat strategy ever conceived, mainly by being involved in every major battle in history personally. Immortus even comments on teaching many of history's best minds of war; in the "Homecoming" episode, he refers to Sun Tsu—the Chinese military philosopher and author of "The Art of War"—as one of his "finest students". Immortus has command over armies of both human and robot soldiers, and often uses them as part of a larger plot in executing attacks. He is frozen by the Teen Titans at the end of "Titans Together".