10 Worst Things Loki Has Ever Done To Thor
5. He Turned Thor Into A Frog
When the fire demon Surtur invaded Asgard, Loki aided his brother in defeating him. However, it turned out to all be a ruse so that Loki could get his hands on the Twilight Sword, Surtur's magical blade. The sword boosted Loki's powers so that he could enact his ultimate plan... turning Thor into a frog.
Apart from being incredibly humiliating for Thor, it also allowed Loki to create a magical duplicate of his brother. He then used this fake Thor as a puppet ruler while he secretly controlled Asgard.
The story is a beloved part of Walter Simonson's classic run. He managed to turn an inherently goofy concept into an epic fantasy fairy tale.
Thor met a tribe of talking frogs who lived in Central Park and helped them defeat an army of rats who had invaded their land. After turning down a marriage proposal from the frog queen, he then found Mjolnir and was able to restore his powers. He was still a frog though, but now he had a tiny helmet and hammer.
Thor then tracked down Loki and kicked his butt, still as an amphibian. He then forced his brother to change him back into an Asgardian.