Foebreaker is a very rare, moderately enchanted (+2) special variant of the Mauls family of weapons. It is a martial melee weapon that's wielded with both hands. Its design doesn't lend itself to be dual-wielded, even by those with special training in dual-wielding.
Properties
- Damage
2d6 + 2 (4~14) + Strength modifier 
Bludgeoning damage - Details
Mauls 
Rarity: Very Rare
Enchantment: + 2
Two-Handed
Can't Dual Wield- Dippable
Melee: 1.5 m / 5 ft
Weight: 9 kg / 18 lb
Price: 480 gp
Special
The holder of this item gains:
- Lethal Weapon: This weapon ignores Bludgeoning Resistance.
Weapon actions
If you have proficiency, equip in main hand to gain:
-
Backbreaker (
)- Put extra force behind your strike to possibly knock your enemy
Prone.
-
Concussive Smash ()- Hit an enemy with all your might to deal damage and possibly
Daze them.
Where to find
Foebreaker can be found in a chest in the Karsus section of Lorroakan's Vault, in Baldur's Gate's Lower City. Once in the vault and you find the named doors, go through Silverhand -> Abjuration -> Silver to find a lever to unlock the Karsus vault door. Then go through Demon to return to the starting room quickly. The chest is invisible and will require See Invisibility or Faerie Fire to reveal it.