Radiant Rod

Rod, rare (requires attunement)

This glittering crystal scepter imparts flashes of coruscating light to spells you cast. When you cast a spell that deals electricity, fire, or force damage, as a bonus action you can infuse it with dazzling light. Creatures failing their saving throw take a -1 penalty on attack rolls and have disadvantage on vision-based Wisdom (Perception) checks for 1 round. A spell dealing radiant damage has this effect on any creature damaged by it even if they succeed on their saving throw, and you also increase the radiant damage you deal by 1d6.

After using the radiant rod’s power three times, you cannot use it again until you complete a long rest.