Oath of Platinum Knight

The Oath of the Platinum is a very sacred oath between oneself and the platinum dragon himself. Paladins of this oath forge a covenant in which they aspire to be the protectors and honor themselves as "Good Dragons". In exchange for willing to give themselves to his cause Bahamut is known to impart some of his power, and even rumored to let a few of his champions become a platinum dragon themselves.

The Oath of the Platinum Knight is a covenant forged between paladins and Bahamut. Paladins of all races who take this oath, often known as Platinum Knights, pledge to protect good dragons, honor his principles, and prove themselves worthy to be an Honorary Dragon. In exchange, Bahamut imparts some of its own power, allowing the paladin to assume the visage of a dragon to help strike down the evil in the world. Champions of Bahamut must stand above the crowds as beacons hope and justice, fighting to protect the laws of the Material Plane.

Channel Divinity

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

Platinum Protection - As a bonus action you call forth the protective armor of the platinum dragon to help guard yourself or a chosen ally. This ability increases the AC of the chosen target by 2+(your CHA modifier) for an amount of turns equal to your highest level spell slot available to you as a Paladin.

Breath Weapon: As an action, you can expend your Channel Divinity to exhale with the destructive breath of the mighty dragon. Your damage type is radiant in a 30ft cone and each creature in the area of exhalation must make a Constitution saving throw, a creature takes 2d6 damage for each point of your proficiency bonus, or half as much damage on a successful save.

Oath Spells

You gain oath spells at the paladin levels listed.

Oath of Devotion Spells

Aura of Dragons

Starting at 7th level, when a creature with a challenge rating of less than your level moves within 10 feet of you, you can use your reaction to invoke the aura of the Platinum Dragon. That creature must take a Wisdom saving throw or be frightened for 1 minute or until it takes any damage. After a creature fails its saving throw against this effect, it is immune for 24 hours.

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

Purity of Platinum

Beginning at 15th level, you are always under the effects of a protection from evil and good spell.

Avatar of Bahamut

At 20th level, as an action, you can magically transform yourself into an Adult Platinum Dragon. Using the stat block for the monster Adult Gold Dragon, and exchanging instances of fire for radiant damage. You do not gain Legendary or Lair actions, but retain 1 Legendary Resistance. Once the dragon's HP reaches zero you revert to your normal form with previous statuses and conditions.

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