Oath of the Arcanist

The Oath of the Arcanist is one of learning and understanding. Otherwise known as Spellblades, paladins who follow the Oath of the Arcanist often accompany wizards and mages on dangerous journeys, protecting them as they seek knowledge of magic. To these paladins, there is no cost too great for knowledge, and they would readily sacrifice themselves if it gave another access to arcane secrets.

Tenets of the Arcanist
Though the exact words and strictures of the Oath of the Arcanist vary, paladins of this oath share these tenets.
Knowledge: Seek to know for the sake of knowing, and learn for the sake of learning.
Observation: Detach yourself from morality and observe your surroundings, do not allow emotion to cloud your mind.
Sacrifice: Earn through sacrifice, and give what can be shared freely.
Fixation: Never abandon a cause once you have committed yourself to it.
Evaluation: Reflect on situations, and think on what is learned. Glean all information possible from a statement.

Channel Divinity

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

Arcane Reverberation. As an action, you can imbue one weapon that you are holding with arcane energy, using your Channel Divinity. For 1 minute, whenever you cast a spell, the next attack you make with that weapon before the end of your next turn deals additional force damage equal to your intelligence modifier + a number of d4 equal to the spell's level. For these attacks, the weapon becomes magical.

You can end this effect on your turn as part of any other action. If you are no longer holding or carrying this weapon, or if you fall unconscious, this effect ends.

Trace of the Arcane. As an action, you present your holy symbol and mutter an incantation melding arcane and divine energies. For one minute, all magical items, magical effects, spellcasters, or creatures affected by magic, emit a faint glow. All creatures affected in this manner have disadvantage on stealth checks unless they are in an area of bright light.

Oath Spells

You gain oath spells at the paladin levels listed.

Oath of Devotion Spells

Aura of Focus

Starting at 7th level, whenever you succeed on a saving throw, all friendly creatures within 10 feet of you that must also make a saving throw against the same spell or effect automatically succeed.

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

Magical Resilience

Beginning at 15th level, you gain immunity to force damage from spells, as well as advantage on checks made to maintain concentration on spells.

Maelstrom of Intellect

At 20th level, as an action, you can imbue yourself with the arcane knowledge you have accrued over the course of your life. For one minute, whenever you make an attack roll, saving throw, or ability check, you add your intelligence modifier to the roll.

For the duration, you also have advantage on saving throws against spells.

Your AC also increases by your intelligence modifier against spell attacks for the duration.

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