Chains in Norse lore symbolize both power and restraint, most famously represented by the magical chain Gleipnir, used to bind the mighty wolf Fenrir. Crafted by dwarves from impossible materials, Gleipnir was unbreakable and played a crucial role in keeping Fenrir restrained until Ragnarok, the prophesied end of the world. Chains like Gleipnir highlight themes of control, fate, and the inevitable struggle against forces of chaos in Norse mythology.