(Homebrew Subclass, Credit to u/Matthaus_Alcarin)

Oath of Harmony

The Oath of Harmony is sworn by knights who devoutly believe music and emotion must be regarded with the highest admiration and respect. Paladins who take up this oath protect bards and other artist from harm; and aid, encourage, and entertain those suffering in times of great tragedy.

Tenets of Harmony

The tenets of the Oath of Harmony have been established by bardic colleges centuries ago. The oath doesn't bind itself to law or chaos, but asserts the conviction that the world is good in nature.

Harmonize.
Working together is the key to success. Every soloist needs their accompaniment. Empower your friends and allies to achieve greatness.

Quell the Silence.
Stand against the forces that wish to snuff out the joy of life. The good that sings loud and proud must never be silenced.

The Show Must Go On.
Never submit in the face of great adversity. Let music revitalize the hope for all who live in despair.

Oath Spells

You gain oath spells at the paladin levels listed.

Practice makes Perfect

At 3rd level you gain proficiency in two instruments of your choice.

Channel Divinity

When you take this oath at 3rd level, you gain the following two Channel Divinity options.

• Fortississimo. You wield sound as your weapon. You can use your Bonus Action to add thunder damage equal to your Charisma modifier on melee weapon attacks for 1 minute.

• Beguiling Melody. As an action, you sing or play a short, beautiful song. Creatures of your choice within 30 feet of you that can hear you must make a Wisdom saving throw against your paladin spellcasting DC. On a failure, each creature becomes charmed for 1 minute or until you or one of your allies damages it.

Aura of Rhythm

Starting at 7th level, your musical presence beats with energy, keeping your allies moving. Creatures of your choice that start their turn within 10ft of you gain 10ft of extra movement till the end of their turn, movement does not provoke opportunity attacks if they are within 10ft of you.

At 18th level, the range of this aura increases to 30 feet.

Music transcends all Barriers

Starting at 15th level, you are always under the effects of the tongues spell.

Additionally, you gain proficiency in the Persuasion and Performance skills if you don't already have it. If you already have proficiency in either or both of the aforementioned skills, your proficiency bonus is doubled with those skills.

Inspiring Cadence

At 20th level, as an action, you transform into a one-person orchestra. An epic concoction of sound and rhythm fills the space around you. You gain the following benefits for 1 minute:

• You have immunity to thunder damage.

• The first time an enemy creature hits you with a melee attack on its turn, it must succeed on a Constitution saving throw or be stunned till the end of their next turn by the amplified reverberation of the hit.

• Allied creatures who start their turn within 60 feet of you regain hit points equal to 1d8 + your Charisma modifier.

Once you use this feature, you can't use it again until you finish a long rest.