Focusblade
Weapon (any sword), very rare (requires attunement)
You gain a bonus to attack and damage rolls made with this sword equal to half your proficiency bonus (rounded down). This sword has a number of charges equal to half your proficiency bonus (rounded down), and it regains all expended charges when you complete a long rest. When you attack with this weapon and miss, you can expend 1 charge to turn that miss into a hit.
Chiandre feels the world slow around her as she thrusts her sword forward. The gleaming steel sings in her hand as it pierces the air. In the breadth of a second, one thousand scenarios play out in her mind: the demon moves too quickly and deflects the blade, Chiandre loses her footing and impales herself on its sword, a stray ember blinds her and she thrusts wide... Each of these unacceptable outcomes are skewered upon her blade as it unerringly plunges into the demon’s screaming face.