The rainbow represents all that is good and just in this world. It softens the hardest of expressions, and treats all as equals. Clerics who serve the deities, Iris, Anuenue, and the Rainbow Serpent, are often on missions to spread joy and happiness throughout the various worlds.

Touched by Light

When you choose this domain at 1st level, you gain the light and dancing lights cantrips and they do not count against your number of cantrips known.  When you cast a spell that sheds light (such as the dancing lights cantrip or the daylight spell) you can make the light radiate any color or multiple colors of your choosing. You may also use a crystal as a holy symbol for your cleric spells.

Bonus Proficiencies

When you select this domain at 1st level you gain proficiency in Glassblowers Tools and Jewelers Tools. Your proficiency bonus is doubled for any ability check you make that uses these tools.

Channel Divinity: Expanded Spectrum

Starting at 2nd level, you can use your Channel Divinity to see a larger spectrum of light.

As an action you can grant yourself truesight out to a range of 60 feet for 10 minutes.  Starting at 5th level you can share this feature with a number of allies within 30 fet of you equal to half your proficiency bonus, rounded up.

Brilliant Shine

At 6th level, when you or a creature you can see within 30 feet of you are hit by an attack from a creature within 30 feet of you or the target, you can use your reaction to unleash a flash of prismatic colors. Roll a 1d6 and consult the Prism Table below. The attacker takes damage of the associated type equal to your Wisdom modifier.  At 12th level, this increases to 1d10 + your Wisdom modifier. 

Alternatively, you may instead roll a 1d10. On a 10, blinding white light shines and the creature is blinded until the end of your next turn. On a 7-9, nothing happens and your reaction is wasted.  At 12th level, creatures of your choice within 5 feet of the attacker are also blinded.

Potent Spellcasting

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

Enhanced Prism

At 17th level you become one with the visible spectrum of light. At the end of a long rest, roll a d6 and consult the Prism Table. You gain resistance to the associated damage type and your spells ignore resistance to that damage type .

Additionally, the prismatic spray and prismatic wall spells are added to your list of domain spells.