Moon domain

The Moon domain is a divine domain for clerics who use their connection to Exandria's moons to perform their magic. The Moon domain was created by Matthew Mercer.

Description
The Moon domain is based on the symbolism and power of the two moons of Exandria, Catha and Ruidus. Moon domain clerics powers derive from Catha's association with shadow, illusion, and judicious concealment; and Ruidus's association with fate and fortune. Many of these clerics worship Sehanine, the Moonweaver, but others, especially lycanthropic Moon domain clerics, worship the moons themselves.

One sect of moon clerics dedicated to the Moonweaver believe that, just as the moons only show one face to the world, so too should they hide their face beneath a silver mask that they show to the world, concealing the face beneath.

Powers and abilities
This section is based on pp. 170-171 of the Tal'Dorei Campaign Setting Reborn.

Moon Domain Spells

 * 1st level: faerie fire, silent image
 * 3rd level: invisibility, moonbeam
 * 5th level: hypnotic pattern, major image
 * 7th level: greater invisibility, hallucinatory terrain
 * 9th level: dream, passwall

Clarity of Catha
Beginning at 1st level, when a creature within 30 feet of the moon cleric whom they can see needs to make a Wisdom saving throw, the cleric can use their reaction to grant that creature advantage. This feature may be used a number of times equal to the cleric's proficiency bonus and is restored in full after a long rest.

Channel Divinity: Blessing of the Full Moon
Beginning at 2nd level, as an action, moon clerics can use the power of the moon to temporarily grant their allies some of the heightened abilities commonly associated with lycanthropy. They can choose one of the following two blessings each time they use this feature:
 * Blessing of the Watchful Moon: The blessed ally's speed increases by 10 feet, and they have advantage on Perception and Survival checks that involve smell or that are being used for tracking a creature. This blessing lasts an hour.
 * Blessing of the Blood-Drenched Moon: The blessed ally may use pack tactics: they have advantage on attack rolls against a target if at least one of their allies is within 5 feet of the target and is not incapacitated. This blessing lasts 10 minutes.

Channel Divinity: Mind of Two Moons
At 6th level, moon clerics may expend one of their uses of Channel Divinity to be able to maintain concentration on two spells simultaneously, provided both spells are on their moon domain spell list. If they need to making a saving throw to maintain concentration, they do so at disadvantage, and if they fail the saving throw, they lose concentration on both spells.

Empowered Cantrips
At 8th level, moon clerics deal additional damage on cleric cantrips equal to their Wisdom modifier.

Eclipse of Ill Omen
At 17th level, once per long rest, a moon cleric may draw upon the power of Ruidus, causing it to flare and eclipse any other light. They may, as a bonus action, cause dim, red light to surround them in a 60 foot radius, and may freely choose which creatures within this radius make saving throws with disadvantage and which are unaffected. They also, once per turn, upon dealing radiant damage to a creature within the radius of this effect, may curse that creature as part of their damaging action. A cursed creature's speed is halved, and they cannot regain hit points for the duration of the eclipse.

This ability requires concentration and lasts up to 1 minute. and may be considered a moon domain spell for the purpose of Mind of Two Moons. It may be used even if the cleric cannot see the sky or is on a plane other than the Material Plane.

Notable Moon clerics
Nalys Ildareth - Syngornian Moon cleric and leader of a sect of Moonweaver worshipers.

Behind the scenes
The Moontide Crown's properties may include a feature similar to the Eclipse of Ill Omen.