Source: Bigby Presents - Glory of the Giants

Weapon (Greataxe), Artifact (Requires Attunement)

This massive adze is said to have been wielded by All-Father Annam, not as a weapon but as the tool he used to shape the various worlds of the Material Plane eons ago.

Random Properties. The adze has the following random properties, determined by rolling on the appropriate table in the Dungeon Master’s Guide :

Magic Weapon. When a creature attunes to the adze, the artifact magically adjusts its size so that creature can wield it as a greataxe. The adze is a magic weapon that grants a +3 bonus to attack and damage rolls made with it. On a hit, the adze deals an additional 3d12 force damage. It also deals double damage to objects and structures.

Divine Mattock. As an action, you can call upon the might of the All-Father and use the adze to cast Move Earth or Fabricate . Once this property is used, it can’t be used again until the next dawn.