Magni was born into a tumultuous New Asgard around the year 2020 to Thor and Amora the Enchantress. While he was still just an infant, Magni's life was threatened by Balder's betrayal during the human resistance's raid led by Captain America. While Thor fought the resistance fighters, Balder got a hold of Magni and threatened to kill him if Thor didn't stop his subjugation of humanity. Magni's adoptive uncle Loki saved his life by killing Balder. Thor, no longer restrained by fear for his son's life, killed all of the remaining intruders himself.