The Will-o'-Wisp Lantern is a copper-lined gas lantern with 5 Will-o'-Wisps inside. Glass fills the gaps between the copper. A small door can be found in the front of the lantern. Opening the door lets you release a chosen amount of the Will-o'-Wisps. The Will-o'-Wisps will not attack you, and can be focused on any enemy within a 50 ft. radius.

The lantern casts a yellow glow in a 25 ft. cylinder. Any creature >10 ft. within the light will get advantage on all rolls and an additional 1d8 damage to attacks until provoking the holder of the lantern, or until provoked by the holder, where they will then have disadvantage on all rolls and lose 1d4 damage on their attacks. Any creature <=10 ft. within the light will get an additional 1d4 to damage until provoking the holder, in which they will lose (1d4 - 1) damage on their attacks.

The lantern's glow radius decreases by 5 ft. for every Will-o'-Wisp removed.