10 Characters Who Broke Thor's Hammer
5. Bor - Thor #600 (2009)
In Thor #600, Loki bewitched Thor's grandfather, Bor, compelling him to see everyone as a threat. Believing he was surrounded by enemies, the first king of Asgard invaded the city, attacking everyone that crossed his path.
When Thor learned of Bor's rampage, he attempted to pacify him, unaware of his true identity. Even though the Norse champion remained calm during their confrontation, Loki's magic urged Bor to attack his grandson.
Thor hoped to end the battle quickly by hurling Mjolnir at his opponent. But because Bor was worthy of Mjolnir's power, he was able to catch the enchanted hammer. Due to his bewitchment, Bor didn't realise he was holding the great weapon of Asgard and thus, tossed it away.
As Bor's madness intensified, Thor realised he was preparing to destroy the entire world. Left with no choice, the god of lightning struck Bor with Mjolnir, cracking his hammer in half. Only after the battle concluded did Thor realised that the godling he had just faced and killed was his own flesh-and-blood. Although he was upset that Mjolnir had been destroyed, he was utterly heartbroken to learn he had murdered his own grandfather.