The Casket wasn't the only thing you took from Jotunheim that day, was it? No. In the...

Loki: The Casket wasn't the only thing you took from Jotunheim that day, was it? Odin: No. In the aftermath of the battle I went into the temple and I found a baby. Small for a Giant's offspring, abandoned, suffering, left to die. Laufey's son. Loki: Laufey's son? Odin: Yes. Loki: Why? You were knee-deep in Jotun blood. Why would you take me? Odin: You were an innocent child. Loki: No. You took me for a purpose. What was it?... TELL ME! Odin: I thought we could unite our kingdoms one day. Bring about an alliance, bring about permanent peace... through you. Loki: What? Odin: But those plans no longer matter. Loki: So I am no more than another stolen relic, locked up here until you might have use of me? Odin: Why do you twist my words? Loki: You could have told me what I was from the beginning! Why didn't you? Odin: You're my son... I wanted only to protect you from the truth... Loki: What, because I... I... I am the monster parents tell their children about at night? Odin: [unwell] No! No! Loki: You know, it all makes sense now, why you favored Thor all these years, because no matter how much you claim to love me, you could never have a Frost Giant sitting on the throne of Asgard! [an overcome Odin collapses] Loki: Guards! Guards, please help!