You have a sword known as Nightblood. It comes with an aluminium sheath. Nightblood is imbued with the command of "Destroy Evil", and will take all it can to that effect. Evil people feel a strong desire to wield the sword, at which point they are overtaken by the swords command and go on a killing spree where they kill everything evil in sight and then themselves. Good people will feel an aversion to the sword, but they will not be overtaken if they wield the sword. The sword will consume your lifeforce when picked up, or any magical source if you have any available. Everything the blade touches will turn into a dark inky smoke as it is destroyed. It is powerful enough to kill the Vessel of a Shard of Adonalsium, but it did not destroy the Shard itself.