The Glaive (Dart +2)

This 5-pointed dagger is an ancient weapon; its appearance in the world is always accompanied by the rise of great evil.
The Glaive and its owner share a special bond. As an action, the weapon can be commanded to do as its user wishes (fly, hover, attack an object, wedge itself in a door, ect.) The owner must maintain concentration on The Glaive, as if casting a spell. If concentration is lost, The Glaive falls inert and must be summoned as an action.