WARNING: This article contains major spoilers for Loki episode 5.
A surprising moment in Loki explains that Kid Loki killed Thor, and the Marvel Cinematic Universe may also reveal exactly how he did it. In Loki episode 5, Lady Loki (Sophia Di Martino) learns that the Time Variance Authority doesn't directly destroy all matter when it prunes a timeline. Instead, pruning simply sends variants to a void at the end of time. Believing the puppeteer controlling the TVA is living beyond the Void, Lady Loki prunes herself and ends up reuniting with Loki (Tom Hiddleston), who was previously pruned by Ravonna Renslayer (Gugu Mbatha-Raw).
The Void is home to numerous Loki variants who somehow stepped off of the TVA's Sacred Timeline. These include Kid Loki (Jack Veal), Boastful Loki (DeObia Oparei), Classic Loki (Richard E. Grant), and even Alligator Loki. "It's best not to question it," Loki tells Lady Loki after introducing the reptilian God of Mischief. Loki variants are consummate survivors, which explains why so many of them reside in the Void and regularly outwit Alioth, a cloud-like monster that consumes matter and energy. As Mobius (Owen Wilson) quips in Loki episode 5, "You throw a rock out here, you hit a Loki."
Loki episode 5 reveals Kid Loki was sent to the Void after killing Thor, and the MCU may have previously explained how. According to a viral theory (via TikTok), it may have been a childhood prank. In the episode, Kid Loki explains that his nexus event was killing Thor, but he's scant on details. However, a scene in Thor: Ragnarok shows the God of Thunder (Chris Hemsworth) explaining that a young Loki once turned into a snake and stabbed him. With Kid Loki's affinity for blades, it's possible Thor died due to a prank gone wrong, signaling the TVA to arrest the young God of Mischief for Thor's murder.
The timing works out for the Marvel fan theory. After all, the adult version of Loki has tried to kill Thor numerous times, and they were all unsuccessful. How is it possible that a child-sized God of Mischief, whose powers aren't yet fully developed, managed to knock off the God of Thunder? A prank gone wrong would perfectly explain things. Plus, Kid Loki has been in the Void long enough to establish himself as the king. In Ragnarok, Thor says the snake incident happened when they were eight years old. Kid Loki could've been growing up in the Void since then.
While the theory seems possible, there could obviously be other explanations for Thor's death. In the Marvel comic "Fear Itself," Kid Loki doesn't use his sword for his brother's demise. He makes various decisions that eventually result in Thor's death, so perhaps the murder was more indirect. Additionally, Hemsworth improvised the snake line as one of Loki's attempts on his life. With the line supposedly coming off of the top of Hemsworth's head, it'd be weird for that specific incident to suddenly become the tragic backstory for Kid Loki. If the snake moment did result in Thor's death, maybe Kid Loki isn't truly to blame. It's clearly Hemsworth's fault.
Loki releases new episodes every Wednesday on Disney+.
