Xunderbrok is a magic weapon that grants a +1 bonus to attack and damage rolls made with it. It has the thrown property with a normal range of 20 feet and a long range of 60 feet. When you hit with a ranged attack using this weapon, it deals an extra 1d8 damage or, if the target is a giant, 2d8 damage. Immediately after the attack, the weapon flies back to your hand.

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

Ancestral Properties

• Enhanced Weapon (level 1)
  3 Spirit points, limited
  You have a +1 bonus to attack and damage rolls made with
  this weapon.
  
  
• Doomerang
  3 Spirit points
  The weapon gains the thrown property. When used this way it flies
  back to your hand at the end of your turn via the most direct
  route. Any creature in its path must make DC 10 Dexterity
  saving throw, suffering d8 damage of the weapon’s type on a
  failed save.
  
  
• Giant-Bane
  4 Spirit points
  Your weapon attacks deal an additional d8 damage to
  creatures of large size or larger.

Blessings of Moradin

If you are a dwarf attuned to the hammer, you gain the following benefits:

• You gain proficiency with artisan’s tools related to blacksmithing, brewing, and stonemasonry.
  
• Advantage on Persuasion checks with Dwarves. 

 

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

Notes: Bonus: Magic, Advantage: Persuasion, Damage: Additional, Proficiency: Smith's Tools, Proficiency: Brewer's Supplies, Proficiency: Mason's Tools, Requires attunement by a Dwarven ancestor of Clan Ironvein, Damage, Buff, Debuff, Combat, Cursed, Versatile, Push