Original Sin: Thor & Loki - The Tenth Realm

In this 2014 Marvel one-shot, writers Al Ewing and Jason Aaron team with artists Lee Garbett and Simone Bianchi to bridge the gap between the "Original Sin" event and the revelation of a lost tenth realm. The story follows Thor and Loki as they confront the truth of this hidden world, exploring the fallout of a secret that reshapes the Asgardian cosmos. A key piece of Jason Aaron's broader Thor saga, this issue matters for the way it deepens the mythology of the Nine Realms and redefines the relationship between the two brothers.