Sword of Vengeance

+1 to attack and damage.
You are unwilling to part with the sword, keeping
it on your person at all times. While attuned to it,
you have disadvantage on attack rolls made with
weapons other than this one.
While you have the sword, you must
succeed on a DC 15 Wisdom save whenever you
take damage in combat. On a failed save you must
attack the creature that damaged you until you or
it drop to 0 hit points or until you can't reach it
to make a melee attack against it.