Vambrace of the Kasei

This set of scale armour, perhaps wrought from the vambrace of some larger being, is lightly engraved with jagged lines. Reminiscent of the Giant script, they softly glint blue in the light.
When you cast a spell of 1st level or higher, the armour glows brighter, storing a number of charges equal to the spell's level. When a creature hits you with a melee attack, you may use your reaction to expend all of the charges. If you do, the attacker takes lightning damage equal to the number of charges expended. You lose any charges on the armour when you doff it (assumedly as part of a long rest, unless you want to wake up with exhaustion)
Category:Weapons