The short answer is no, the Crystal Halberd in Dark Souls cannot be repaired. This powerful but fragile weapon has a unique property that sets it apart from other weapons in the game.
Crystal Weapons and Durability
Crystal weapons in Dark Souls, including the Crystal Halberd, have significantly reduced durability compared to regular weapons. While this makes them extremely powerful when they are in good condition, it also means they will break much faster with regular use.
Repairing the Crystal Halberd
Unlike regular weapons, the Crystal Halberd cannot be repaired at any blacksmith or bonfire. Once the durability reaches zero, the weapon will be permanently broken and unusable. The only way to “repair” a Crystal Halberd is to upgrade it further with the Giant Blacksmith, which will reset the durability. However, this is not a true repair, as the weapon will continue to degrade with each use.