The lantern can be activated or deactivated as a bonus action. Once activated, the light-absorbing effect lasts for 10 minutes. The lantern can be used a proficency bonus number of times per day. Upon activation, the lantern produces a 10-foot radius of magical darkness around the crystal, where all light is completely absorbed, creating conditions of total darkness. This magical darkness blocks all normal and darkvision. Beyond the core of darkness, the Lantern’s influence reaches further. In an additional 20-foot radius, it warps light itself, transforming bright light into dim light and plunging areas of dim light into non-magical darkness, creating a zone of shadowy confusion for your enemies.
Light spells of 2nd level or higher cast within or into the lantern’s area of effect overpower the magical darkness, reducing its effect so that light is only dimmed, not completely absorbed. Within the intersection of the 2nd level or higher light spell and the radius of the Lantern’s effect, light can only be reduced to dim light, not total darkness.