Azuredge

Weapon (battleaxe), legendary (requires attunement)
Forged by the archwizard Ahghairon, this intelligent battleaxe was crafted to defend Waterdeep. It was once wielded by Meloon Wardragon, but after Meloon's fall, the weapon chose Regulus Starfeller as its new wielder.
Azuredge has a solid steel handle etched with tiny runes, wrapped in blue dragon hide with a star sapphire set into the pommel. The axe head is forged from silver, electrum, and steel alloys whose edges constantly shimmer with a deep blue luminescence.
Azuredge is sworn to protect Waterdeep, and it desires to be wielded by a law-abiding person willing to dedicate everything to the city's defense. The weapon is patient and takes its time finding its ideal wielder.
If someone tries to use Azuredge against its will, the axe can become ten times heavier than normal, and can magically adhere to any Medium or larger object or surface it comes into contact with. Once it does so, the axe can't be wielded. Nothing short of a Wish spell can separate the axe from the item or surface to which it is adhered without destroying one or the other, though the axe can choose to end the effect at any time.