Comments from the Finger: My two motivations for making this were to make a counterpart to the War Domain, and to bring one of my favorite effects, Peacebond, to 5th edition.
Clerics of peace venerate the ideal of harmony, and search for nonviolent solutions to worldly problems whenever possible. However, they are not strictly pacifists. If a situation proves too dire, or if all other options are exhausted, these clerics may use violence, especially if it protects someone in need. Gods of this domain - including Eldath, Rao, and Majere - are almost exclusively good, as are their clerics.
Peace Domain Spells
Cleric Level Spells
1st charm person, sanctuary
3rd calm emotions, hold person
5th protection from energy, tongues
7th confusion, freedom of movement
9th dominate person, dispel evil and good
When you select this domain at 1st level, you can channel holy power from the divine planes to censure evil creatures. Your Turn Undead and Destroy Undead features also effect fey and fiends.
At 1st level, you can magically speak in a booming voice, commanding attention and authority. You gain a bonus of half your proficiency bonus when you make a Persuasion check to command other creatures. This benefit stacks with your proficiency bonus if you are already proficient in Persuasion.
Channel Divinity: Peacebond
Starting at 2nd level, as an action, you can pacify nearby creatures. Each creature within 30 feet of you must make a Wisdom saving throw. On a failed save, the creature's weapons and ammunition become locked in their sheaths, quivers, or holsters for 1 minute. During this time, a creature may only free their weapon with a DC 18 Strength check.
At 6th level, as a reaction when a creature that you can see attacks a creature that has not yet taken a turn in combat, you can cause that attack roll to be made at disadvantage.
At 8th level, you gain the ability to infuse your weapon strikes with divine energy. Once on each of your turns when you hit a creature with a weapon attack, you can cause the attack to deal an extra 1d8 radiant damage. When you reach 14th level, the extra radiant damage increases to 2d8.
Beginning at 17th level, as an action you can create an aura of pure pacifism for up to 1 minute. Each creature within 15 feet of you makes attack rolls with disadvantage. On your turn, you must spend your action maintaining this effect, otherwise it ends. After using this feature, you must compete a long rest before using it again.