Aurumplate Robes

These robes can hold a maximum of 5 charges and lose all charges daily at dawn. When you cast a spell of 1st level or higher while wearing the robes, they gain a number of charges equal to the level of the spell.

Discharge. As a reaction when a creature hits you with a melee attack, you can expend any number of charges. The creature must make a DC 15 Constitution saving throw, taking 1d10 force damage for every charge expended on a failed save, or half as much on a successful one.

Recharge. As a reaction when you fail a Constitution saving throw made to maintain concentration on a spell, you can expend a number of charges equal to the level of the spell (minimum 1) to reroll the saving throw.

Notes: spellcaster