Cleric: Light Domain

Bonus Cantrip

When you choose this domain at 1st level, you gain the Light cantrip if you don't already know it.

Warding Flare

Also at 1st level, you can interpose divine light between yourself and an attacking enemy. When you are attacked by a creature within 10 meters of you that you can see, you can use your reaction to impose disadvantage on the attack roll, causing light to flare before the attacker before it hits or misses. An attacker that can't be blinded is immune to this feature.

You can use this feature a number of times equal to your Wisdom modifier (a minimum of once). You regain all expended uses when you finish a long rest.

Channel Divinity: Radiance of the Dawn

Starting at 2nd level, you can use your Channel Divinity to harness sunlight, banishing darkness and dealing radiant damage to your foes.

As an action, you present your holy symbol, and any magical darkness within 10 meters of you is dispelled. Additionally, each hostile creature within 10 meters of you must make a Constitution saving throw. A creature takes radiant damage equal to 2d10 + your cleric level on a failed saving throw, and half as much damage on a successful one. A creature that has total cover from you is not affected.

Improved Flare

Starting at 6th level, you can also use your Warding Flare feature when a creature that you can see within 10 meters of you attacks a creature other than you.

Potent Spellcasting

Starting at 8th level, you add your Wisdom modifier to the damage you deal with any cleric cantrip.

Corona of Light

Starting at 17th level, you can use your action to activate an aura of sunlight that lasts for 1 minute or until you dismiss it using another action. You emit bright light in a 20-meter radius and dim light 10 meters beyond that. Your enemies in the bright light have disadvantage on saving throws against any spell that deals fire or radiant damage.