You have a +3 bonus to attack and damage rolls made with this magic weapon.

The Worldbreaker is an Artifact magic warhammer/maul. It cannot be wielded or attuned to by anyone who has a strength of less than 27, and cannot be moved in any manner by someone who is not attuned.

Worldbreaker is a gigantic warhammer; a maul that makes all other mauls jealous. the handle is six feet long, nearly two inches thick, and looks to be made of very old steel. the pommel of the hammer is a ball of black marble, about eight inches in diameter. the enormous head of the hammer is roughly rectangular with rounded off edges, and looks to be about four feet long on its longest dimension. it, like the handle, appears to be made of very old steel with tarnished gold and copper designs adorning every one of its faces, with runes covering any space that isn't already covered by decoration.

It allows the wielder to strike the ground and create a shockwave as per the earthquake spell, with a range of only self, and a duration of one round, no concentration. Once this property has been used, roll a d6 at dawn of each day. On a 6, this ability can be used again.

the user can also use the item to duplicate the effects of the Mold Earth spell and Earth Tremor at will, without technically casting the spell, but functioning the same.

spells cast use wisdom as a spellcasting ability modifier

the weapon can be interposed between the user and an attacker as a reaction to add the user's constitution modifier to AC for that one attack

the wielder is immune to being frightened

Proficiency with a Maul allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Damage: Bludgeoning, requires attunement by a creature with a strength of 27 or greater, Damage, Combat, Heavy, Two-Handed, Topple