Atma

In the Digital Devil Saga: Avatar Tuner series, Atma is the mystical virus that grants an affected human the ability to transform into a demonic Atma Avatar. A human imbued with Atma manifests an Atma Brand related to their Avatar form; when the person takes on their Avatar form, the Band glows and veins shoot out from it across the person's body. All humans in the Junkyard were imbued with Atma after the mysterious egg at Ground Zero hatched.