Longsword of Vengeance

A Longsword found amongst the belongings of a mysterious Necromancer and claimed by the paladin, Leoven. Seeing it's magically enanced edge, she decides to begin weilding the blade. Unbeknownst to her the blade was possessed by a vengeful spirit. This spirit forced an unwilling Leoven to attack any creature that attacked her, unless she could exert her will over the spirit. Unfortunately she failed many times to take assertion over the blade, creating many dangerous encounters with the barbarian, Carban Fistskin and a very close encounter with the druid, Adrasteia.
Fortunately, after an encounter with the creature, known as the Bagman, the sorcerer Oto, managed to take the blade and try and get it excorsised at a temple. After bringing a calmed Leoven to the ritual, within the temple of Artemis. Leoven was presented with the choice to try and bring the spirit to rest or to destroy the spirit now. She decided it was too large a risk to the party to keep and so made to destroy the spirit. Through a close struggle Oto and Leoven managed to destroy the spirit, it uttering "I will have my vengeance, brother!" before being disappearing. Unfortunately this also broke the blade itself, and Leoven was left swordless for a short time, before procuring a replacement. Leoven did keep the broken peices of the sword with her as a momento on her journey.
Later though the sword would once again make an appearance, after many of the dead had rejoined the living on the day of King Eugammons funeral, the party were attempting to travel to Dexicos when they were ambushed by three Myth Enders, wearing Black Masks instead. Leoven was surprised while on watch and was fully taken out by one of these Myth Enders arrows. There she was visited by the spirit of Bravo, telling her a part of his vengeance still remained within Leovens spirit and that in exchange for it's return he could allow her to take "vengeance" upon these myth enders. She returned to conciousness weilding the sword held together by a dark energy. Which allowed the party to defeat the Myth Enders, she promptly fell unconcious again once the battle had ended. She is yet to discover the consequences of this.
Weapon of Vengeance
You gain a +1 bonus to attack and damage rolls made with this magic weapon.
Curse. This sword is cursed and possessed by a vengeful spirit. Becoming attuned to it extends the curse to you. As long as you remain cursed, you are unwilling to part with the sword, keeping it on your person at all times. While attuned to this weapon, you have disadvantage on attack rolls made with weapons other than this one.
In addition, while the sword is on your person, you must succeed on a DC 15 Wisdom saving throw whenever you take damage in combat. On a failed save, you must attack the creature that damaged you until you drop to 0 hit points or it does, or until you can’t reach the creature to make a melee attack against it.