You gain a +1 bonus to attack and damage rolls made with this magic weapon.

Curse. This sword is cursed and possessed by the vengeful spirit of your father. you are bound to this weapon through your pact with him. As long as you remain reamain in a magical pact with him, 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 and you gain a form of indefinite madness determined by you and the DM.

In addition, you must succeed on a DC 13 Wisdom saving throw whenever you take damage. On a failed save, you go into a Vengeful Rage and must attack the creature or object that damaged you until you drop to 0 hit points or it does, however if you can’t reach the creature to make an attack against it after each round you make an additional saving throw and on a success the rage subsides

Vengeful Rage. While under the effects of vengeful rage you deal a extra 1D4 damage against the target of your rage when attacking with Last Embrace , additionally when you make your first attack on your turn against the target of your rage, you can decide to attack recklessly. Doing so gives you advantage on melee weapon attack rolls against the target of your rage using Last Embrace during this turn, but attack rolls against you have advantage until your next turn.

Vengeful Hex. Once per day per day you may use a bonus action to willing trigger the effects of vengeful rage against a target of your choice that has dealt damage to you in the last 24 hours. Last embrace regains the ability to use this feature again at dawn

 

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Damage, Combat, Cursed, Versatile, Sap