In God of War Ragnark, Atreus unconsciously uses Spartan Rage and transforms into a bear form, attacking his own father Kratos after Fenrir's death. He later learns to properly channel and manifest his Spartan Rage after learning of the prophecy of Kratos's death and him joining the Aesir as 'Loki'. Upon activation, Atreus transforms into a wolf form, and forgoes bow and spell combat to instead attack enemies with powerful bites, inflicting large amounts of Stun where he can then tear the heads off of most foes. During Ragnark, Atreus is able to transform into a bear form again with full control of it. In this form, he attacks enemies with powerful claws.