Zarglebane, the Influential Longsword of Mysterion, is one of the most powerful magical weapons ever found. It shimmered with arcane power, which was able to help its wielder overcome even the most ferocious of enemies (and also sported quite a few large spikes).

This august longsword was once the prized possession of King Mysterion the Brave. Having found it abandoned in the woods when he was merely a young prince, Mysterion took the sword home and raised it as his own. Known more for his valor than his brains, Mysterion tried to have the sword educated and then brought into his court. He claimed it was his most influential advisor, always in his hand, and gained a reputation for decapitating anyone that disagreed with him.

During the Great Monster Uprising, Zarglebane, which had found its way in the hands of the Grand Wizard, was awarded to an adventurer for assisting him in the defeat of Frizzlebits.

SOURCE(S): Legends of Zork