Duskstone

Wondrous item, artifact (requires attunement)

The Duskstone is one of two ancient stones that were created by the gods to control the sun and the moons. Legend says that the gods intended for the stones to allow man to have control over their own days, but man quickly proved incapable of handling that trust. The artifacts were modified to keep them out of the hands of the irresponsible, and have since faded into myth and legend.

Random Properties. The Duskstone has the following randomly determined properties:

3 minor detrimental properties

1 minor beneficial property

Celestial Keepers. If you are an Aasimar or a Celestial, then you only suffer from 1 minor detrimental effect.

Ties to the Moon. Upon attuning to the Duskstone, choose one of the moons (Luna, Mon, or Cyr). This moon becomes your Chosen Moon. Your Chosen Moon can only be changed by unattuning to the Duskstone and then attuning to it again.

Protection of the Moon. You are resistant to all damage during the night. If Everlasting Night is active, then you become immune to all damage. However, if your attacker is an Aasimar, a Celestial, an immediate blood relative (parent, sibling, or child) of an Aasimar or a Celestial, or is attuned to the Dawnstone, then you take damage as normal. Any natural resistances or immunities that you have are ignored.

Channel Darkness. While it is night outside, whenever you deal damage to another creature, you can choose to do necrotic damage instead. If Everlasting Night is active, then you can also choose to deal maximum damage.

Everlasting Night. Once you have been attuned to the Duskstone for 12 cycles of your Chosen Moon, you can use an action to bathe your surroundings in eternal night. Everything within 3 miles of you is plunged into a nighttime darkness, and your Chosen Moon appears to be full within this darkness, and can be seen through any obstacles. For each additional cycle of your Chosen moon that passes since you first attuned to the Duskstone, you can extend this effect another 3 miles. This property ends if you use an action to end it, die, or otherwise become unattuned to the Duskstone.

If you are currently in a region that is being affected by the Dawnstone’s Everlasting Day property, then you cannot use Everlasting Night, and if an area affected by Everlasting Night overlaps with an area affected by Everlasting Day, then the Everlasting effect that was activated last is dispelled.

Duskbringer. If you are within 500 feet of a creature that is currently using the Dawnstone’s Everlasting Day property, then you can use an action to immediately convert the day into dusk. While within this dusk, neither the sun nor your Chosen Moon are visible, and you can use the Duskstone's other properties as though Everlasting Night is active. Until you choose to end the dusk with an action, die, or otherwise become unattuned to the Duskstone, the creature that is attuned to the Dawnstone cannot end their Everlasting Day. If either you or the creature attuned to the Dawnstone die while within this dusk, then both the Duskstone and the Dawnstone fall inert and none of their properties can be used for 10d10 years.

Destroying the Stone. A disintegrate spell or one good hit from a +3 magic weapon is sufficient to destroy the stone, but only when it is inert, or if the Dawnstone has already been destroyed.