Moonshade used to be a singular legendary rapier, one of the artifacts created under the light of Serenox, alongside Rûdheryn. The soul stealing sword contains thousands of souls within it, and it was passed down through the generations under House Gaten. It lost a lot of its powers over the ages, but it was reawakened by Werner von Gaten.
Later, Werner von Gaten fought a version of his brother from a different timeline. Upon defeating him, he took this alternate timeline version of Moonshade as well, getting a duplicate version of the legendary sword.
martial melee weapon, 1d8 piercing, rapier, finesse, very rare (requires attunement)
The hilt of this sword bears the moonspider symbol dedicated to the Weavemother, the long lost goddess of the drow who still holds some influence over their religion. This sword is one of bloodshed, and has a +2 bonus to its attack and damage rolls.
You can add your Charisma modifier (minimum of +1) to the damage rolls of attacks made with this weapon.
Web. As an action, you can use the sword to cast Web as a 2nd level spell. Once used, you cannot use this property of the sword again until next dawn.
Once reawakened, the sword gains the following property:
Soul Stealer. When someone is killed by this sword, their soul is consumed by it. As part of this process, you turn the soul into a spell slot. The level of this spell slot is equal to the CR of the creature whose soul was consumed, divided by 5 (minimum of 1). The creature must be at least of CR 1 for you to gain a spell slot. When a creature's soul is consumed by the sword, they are unable to be revived by any means other than a wish spell.