Gauntlets of the Storm

Once per day, the wearer can channel lightning
through their spells, dealing additional lightning
damage equal to their Charisma modifier.
Additionally, the wearer gains resistance to
lightning damage and a +1 bonus to spell attack
rolls and spell save DCs for spells that deal
lightning damage.
Crackling with electrical energy, these gauntlets
imbue the sorcerer's spells with lightning power.