The Silenced Minstrel +1/+1

Rolling a 1-5 on an attack roll causes a lingering
curse to lash out at you, dealing 2d10 force
damage. You may make a DC 15 Cha. save for
half damage. Every long rest you may make a
DC 20 Cha. check to gain control of the curse
increasing the bonus to attack and damage rolls
to +2/+2. A failure results in 4d10 force damage.
The sword, once wielded by the last magus of the
Nemedians appears ornate and beautiful to all except
its owner, who sees the blade as pitted with rot.