Wondrous Item, Legendary (Requires Attunement)
The border-shrine relic of Woundsedge, said to have been lit at the founding of the Last Lantern shrine and never once allowed to gutter. It sheds Bright Light in a 30-foot radius and Dim Light for an additional 30 feet.
Unfailing Light. The lantern's light is true daylight and cannot be extinguished, dispelled, or overcome by magical darkness of 8th level or lower.
Hold the Line. As a Magic action, you can raise the lantern high and speak the shrine's word. Blight-fog and Rustfall are dispersed within 30 feet, and each creature of the Blight Below in that radius makes a DC 17 Constitution saving throw, taking 6d8 Radiant damage and being Blinded for 1 minute on a failure, or half as much damage on a success. Until the start of your next turn, each bonded ally within the light has Advantage on Communion saving throws. Once used, this property can't be used again until you finish a Long Rest.
Source: Sporebound