Lightning Anchor

Wondrous item, very rare

The lightning anchor absorbs the energy from lightning bolts.

Whenever you or a creature within 30 feet of you would be struck by lightning, the lightning hits the lightning anchor instead, which absorbs the bolt entirely. This ability only functions on natural lightning bolts rather than lightning damage from magical effects (however, lightning from a call lightning spell or the storm associated with use of control weather will charge the amulet). For each lightning bolt absorbed in this way, the lightning anchor gains 1 charge, up to a maximum of 3. You can spend 1 charge as a reaction when you or a creature within 30 feet of you would take lightning damage to prevent that damage entirely.