Shar's Blessing

This +1 rapier seems to absorb light. While the
weapon is drawn, you have advantage on stealth
checks. On a critical hit, the weapon deals an
extra 2d6 necrotic damage (you regain HP for
each point of necrotic damage), and the target
must make a CON saving throw (Warlock's spell
save DC) or be blinded until the end of their
next turn. Without attuning, it is a +1 rapier.