The Shattering Sword
Mad Charlie's Weapon
The Shattering Sword is a hollow glass sword that shatters when the weilder wills it to, leaving shards of itself in its prey. The sword has an enchantment on it that it reforms itself the next day, ripping the shards out of the opponent to do so, possibly bringing drops of that person’s blood to the wielder. Despite seeming fragile to the touch, it will not break unless willed or if it strikes iron (it being a fairy weapon and all).